125256321 has 16 divisors (see below), whose sum is σ = 193633920. Its totient is φ = 79873200.

The previous prime is 125256311. The next prime is 125256347. The reversal of 125256321 is 123652521.

It is a happy number.

125256321 is a `hidden beast` number, since 1 + 2 + 5 + 25 + 632 + 1 = 666.

It is not a de Polignac number, because 125256321 - 2⁷ = 125256193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (125256301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100230 + ... + 101471.

It is an arithmetic number, because the mean of its divisors is an integer number (12102120).

Almost surely, 2^125256321 is an apocalyptic number.

It is an amenable number.

125256321 is a deficient number, since it is larger than the sum of its proper divisors (68377599).

125256321 is a wasteful number, since it uses less digits than its factorization.

125256321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201733 (or 201727 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 125256321 is about 11191.7970406901. The cubic root of 125256321 is about 500.3415279975.

The spelling of 125256321 in words is "one hundred twenty-five million, two hundred fifty-six thousand, three hundred twenty-one".