125328921 has 32 divisors (see below), whose sum is σ = 181440000. Its totient is φ = 76704768.

The previous prime is 125328919. The next prime is 125328977. The reversal of 125328921 is 129823521.

It is a happy number.

It is not a de Polignac number, because 125328921 - 2¹ = 125328919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125328911) 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, 278905 + ... + 279353.

It is an arithmetic number, because the mean of its divisors is an integer number (5670000).

Almost surely, 2^125328921 is an apocalyptic number.

It is an amenable number.

125328921 is a deficient number, since it is larger than the sum of its proper divisors (56111079).

125328921 is a wasteful number, since it uses less digits than its factorization.

125328921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its digits is 8640, while the sum is 33.

The square root of 125328921 is about 11195.0400177936. The cubic root of 125328921 is about 500.4381772226.

The spelling of 125328921 in words is "one hundred twenty-five million, three hundred twenty-eight thousand, nine hundred twenty-one".