125510640 has 40 divisors (see below), whose sum is σ = 389083728. Its totient is φ = 33469440.

The previous prime is 125510629. The next prime is 125510659. The reversal of 125510640 is 46015521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 125510640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261241 + ... + 261720.

Almost surely, 2^125510640 is an apocalyptic number.

125510640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125510640 is an abundant number, since it is smaller than the sum of its proper divisors (263573088).

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

125510640 is a wasteful number, since it uses less digits than its factorization.

125510640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522977 (or 522971 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 125510640 is about 11203.1531275798. The cubic root of 125510640 is about 500.6799283092.

The spelling of 125510640 in words is "one hundred twenty-five million, five hundred ten thousand, six hundred forty".