125520561 has 12 divisors (see below), whose sum is σ = 181733760. Its totient is φ = 83483640.

The previous prime is 125520541. The next prime is 125520601. The reversal of 125520561 is 165025521.

It is not a de Polignac number, because 125520561 - 2⁵ = 125520529 is a prime.

It is a super-2 number, since 2×125520561² = 31510822467509442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125520541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12301 + ... + 20058.

It is an arithmetic number, because the mean of its divisors is an integer number (15144480).

Almost surely, 2^125520561 is an apocalyptic number.

It is an amenable number.

125520561 is a deficient number, since it is larger than the sum of its proper divisors (56213199).

125520561 is a wasteful number, since it uses less digits than its factorization.

125520561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32796 (or 32793 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 125520561 is about 11203.5958959613. The cubic root of 125520561 is about 500.6931200585.

The spelling of 125520561 in words is "one hundred twenty-five million, five hundred twenty thousand, five hundred sixty-one".