125974821 has 32 divisors (see below), whose sum is σ = 199733248. Its totient is φ = 69128640.

The previous prime is 125974819. The next prime is 125974831. The reversal of 125974821 is 128479521.

It is not a de Polignac number, because 125974821 - 2¹ = 125974819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125974821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125974831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53940 + ... + 56226.

It is an arithmetic number, because the mean of its divisors is an integer number (6241664).

Almost surely, 2^125974821 is an apocalyptic number.

It is an amenable number.

125974821 is a deficient number, since it is larger than the sum of its proper divisors (73758427).

125974821 is a wasteful number, since it uses less digits than its factorization.

125974821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401.

The product of its digits is 40320, while the sum is 39.

The square root of 125974821 is about 11223.8505424832. The cubic root of 125974821 is about 501.2963971372.

The spelling of 125974821 in words is "one hundred twenty-five million, nine hundred seventy-four thousand, eight hundred twenty-one".