Sphenic

Some articles on sphenic:

42 (number) - Mathematics
... factorization 2 · 3 · 7 makes it the second sphenic number and also the second of the form { 2 · 3 · r } ... As with all sphenic numbers of this form, the aliquot sum is abundant by 12. 42 is also the second sphenic number to be bracketed by twin primes 30 is also a pronic number and also rests between two primes ...
Sphenic Number
... In number theory, a sphenic number (from Ancient Greek σφήνα, 'wedge') is a positive integer which is the product of three distinct prime numbers. 5 has exactly 3 prime factors, but is not sphenic ... All sphenic numbers have exactly eight divisors ...
30 (number) - In Mathematics
30 is the smallest sphenic number, and the smallest of the form where r is a prime greater than 3. 30 has an aliquot sum of 42 the second sphenic number and all sphenic numbers of this form have an aliquot sum 12 greater than themselves ...
3000 (number) - Selected Numbers in The Range 3001–3999
... pyramidal number 3080 – pronic number 3081 – triangular number, 497th sphenic number 3087 – sum of first 40 primes 3119 – safe prime 3121 – centered square number 3125. 3256 – centered heptagonal number 3266 – sum of first 41 primes, 523rd sphenic number 3276 – tetrahedral number 3277 – 5th super-Poulet number, decagonal number 3281 – octahedral ... prime, safe prime 3637 – balanced prime 3638 – sum of first 43 primes, 599th sphenic number 3654 – tetrahedral number 3655 – triangular number, 601st ...