125921404 has 24 divisors (see below), whose sum is σ = 252564480. Its totient is φ = 53811696.

The previous prime is 125921401. The next prime is 125921441. The reversal of 125921404 is 404129521.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125921401) 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 7 ways as a sum of consecutive naturals, for example, 3789 + ... + 16315.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^125921404 is an apocalyptic number.

125921404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

125921404 is an abundant number, since it is smaller than the sum of its proper divisors (126643076).

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

125921404 is a wasteful number, since it uses less digits than its factorization.

125921404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12897 (or 12895 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 125921404 is about 11221.4706701038. The cubic root of 125921404 is about 501.2255323534.

The spelling of 125921404 in words is "one hundred twenty-five million, nine hundred twenty-one thousand, four hundred four".