124656561 has 12 divisors (see below), whose sum is σ = 180156288. Its totient is φ = 83059704.

The previous prime is 124656559. The next prime is 124656599. The reversal of 124656561 is 165656421.

124656561 is a `hidden beast` number, since 1 + 2 + 46 + 56 + 561 = 666.

It is not a de Polignac number, because 124656561 - 2¹ = 124656559 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (124656541) 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, 30696 + ... + 34518.

It is an arithmetic number, because the mean of its divisors is an integer number (15013024).

Almost surely, 2^124656561 is an apocalyptic number.

It is an amenable number.

124656561 is a deficient number, since it is larger than the sum of its proper divisors (55499727).

124656561 is a wasteful number, since it uses less digits than its factorization.

124656561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7452 (or 7449 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 124656561 is about 11164.9702641789. The cubic root of 124656561 is about 499.5416613130.

The spelling of 124656561 in words is "one hundred twenty-four million, six hundred fifty-six thousand, five hundred sixty-one".