15000081 has 8 divisors (see below), whose sum is σ = 20084064. Its totient is φ = 9958080.

The previous prime is 15000079. The next prime is 15000127. The reversal of 15000081 is 18000051.

It is a happy number.

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

It is not a de Polignac number, because 15000081 - 2¹ = 15000079 is a prime.

It is a super-2 number, since 2×15000081² = 450004860013122, which contains 22 as substring.

15000081 is a modest number, since divided by 81 gives 15 as remainder.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15000081.

It is not an unprimeable number, because it can be changed into a prime (15000031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9651 + ... + 11096.

It is an arithmetic number, because the mean of its divisors is an integer number (2510508).

Almost surely, 2^15000081 is an apocalyptic number.

It is an amenable number.

15000081 is a deficient number, since it is larger than the sum of its proper divisors (5083983).

15000081 is a wasteful number, since it uses less digits than its factorization.

15000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20991.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 15000081 is about 3872.9938032483. The cubic root of 15000081 is about 246.6216513504.

The spelling of 15000081 in words is "fifteen million, eighty-one", and thus it is an aban number and an uban number.