12576561 has 16 divisors (see below), whose sum is σ = 17663616. Its totient is φ = 7943936.

The previous prime is 12576547. The next prime is 12576587. The reversal of 12576561 is 16567521.

It is a cyclic number.

It is not a de Polignac number, because 12576561 - 2⁶ = 12576497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12576661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 8603.

It is an arithmetic number, because the mean of its divisors is an integer number (1103976).

Almost surely, 2^12576561 is an apocalyptic number.

It is an amenable number.

12576561 is a deficient number, since it is larger than the sum of its proper divisors (5087055).

12576561 is a wasteful number, since it uses less digits than its factorization.

12576561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its digits is 12600, while the sum is 33.

The square root of 12576561 is about 3546.3447378956. The cubic root of 12576561 is about 232.5522971732.

The spelling of 12576561 in words is "twelve million, five hundred seventy-six thousand, five hundred sixty-one".