125403904 has 36 divisors (see below), whose sum is σ = 251105400. Its totient is φ = 62504960.

The previous prime is 125403881. The next prime is 125403919. The reversal of 125403904 is 409304521.

It is a super-2 number, since 2×125403904² = 31452278276882432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114399 + ... + 115489.

It is an arithmetic number, because the mean of its divisors is an integer number (6975150).

Almost surely, 2^125403904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125403904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125552700).

125403904 is an abundant number, since it is smaller than the sum of its proper divisors (125701496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125403904 is an equidigital number, since it uses as much as digits as its factorization.

125403904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556 (or 1542 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 125403904 is about 11198.3884554877. The cubic root of 125403904 is about 500.5379596579.

The spelling of 125403904 in words is "one hundred twenty-five million, four hundred three thousand, nine hundred four".