125921856 has 112 divisors (see below), whose sum is σ = 356396544. Its totient is φ = 39100416.

The previous prime is 125921843. The next prime is 125921867. The reversal of 125921856 is 658129521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564561 + ... + 564783.

It is an arithmetic number, because the mean of its divisors is an integer number (3182112).

Almost surely, 2^125921856 is an apocalyptic number.

125921856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125921856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178198272).

125921856 is an abundant number, since it is smaller than the sum of its proper divisors (230474688).

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

125921856 is a wasteful number, since it uses less digits than its factorization.

125921856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 418 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 125921856 is about 11221.4908100484. The cubic root of 125921856 is about 501.2261320758.

The spelling of 125921856 in words is "one hundred twenty-five million, nine hundred twenty-one thousand, eight hundred fifty-six".