15001681 has 8 divisors (see below), whose sum is σ = 15695424. Its totient is φ = 14311440.

The previous prime is 15001639. The next prime is 15001733. The reversal of 15001681 is 18610051.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15001681 - 2¹⁵ = 14968913 is a prime.

It is a super-2 number, since 2×15001681² = 450100865651522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15001081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12226 + ... + 13396.

It is an arithmetic number, because the mean of its divisors is an integer number (1961928).

Almost surely, 2^15001681 is an apocalyptic number.

It is an amenable number.

15001681 is a deficient number, since it is larger than the sum of its proper divisors (693743).

15001681 is a wasteful number, since it uses less digits than its factorization.

15001681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 15001681 is about 3873.2003562945. The cubic root of 15001681 is about 246.6304197611.

The spelling of 15001681 in words is "fifteen million, one thousand, six hundred eighty-one".