15006561 has 8 divisors (see below), whose sum is σ = 21061920. Its totient is φ = 9477792.

The previous prime is 15006553. The next prime is 15006577. The reversal of 15006561 is 16560051.

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

It is not a de Polignac number, because 15006561 - 2³ = 15006553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15006361) 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, 131580 + ... + 131693.

It is an arithmetic number, because the mean of its divisors is an integer number (2632740).

Almost surely, 2^15006561 is an apocalyptic number.

It is an amenable number.

15006561 is a deficient number, since it is larger than the sum of its proper divisors (6055359).

15006561 is a wasteful number, since it uses less digits than its factorization.

15006561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263295.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 15006561 is about 3873.8302750637. The cubic root of 15006561 is about 246.6571595638.

The spelling of 15006561 in words is "fifteen million, six thousand, five hundred sixty-one".