125031640 has 64 divisors (see below), whose sum is σ = 287400960. Its totient is φ = 48946560.

The previous prime is 125031631. The next prime is 125031667. The reversal of 125031640 is 46130521.

It is a super-2 number, since 2×125031640² = 31265822002179200, which contains 22 as substring.

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, 560569 + ... + 560791.

It is an arithmetic number, because the mean of its divisors is an integer number (4490640).

Almost surely, 2^125031640 is an apocalyptic number.

125031640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125031640 is an abundant number, since it is smaller than the sum of its proper divisors (162369320).

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

125031640 is a wasteful number, since it uses less digits than its factorization.

125031640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 125031640 is about 11181.7547817863. The cubic root of 125031640 is about 500.0421831077.

The spelling of 125031640 in words is "one hundred twenty-five million, thirty-one thousand, six hundred forty".