125021640 has 64 divisors (see below), whose sum is σ = 383803200. Its totient is φ = 32562432.

The previous prime is 125021609. The next prime is 125021681. The reversal of 125021640 is 46120521.

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, 6955 + ... + 17274.

It is an arithmetic number, because the mean of its divisors is an integer number (5996925).

Almost surely, 2^125021640 is an apocalyptic number.

125021640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125021640 is an abundant number, since it is smaller than the sum of its proper divisors (258781560).

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

125021640 is a wasteful number, since it uses less digits than its factorization.

125021640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24286 (or 24282 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 125021640 is about 11181.3076158381. The cubic root of 125021640 is about 500.0288516685.

The spelling of 125021640 in words is "one hundred twenty-five million, twenty-one thousand, six hundred forty".