125137840 has 40 divisors (see below), whose sum is σ = 295726608. Its totient is φ = 49232640.

The previous prime is 125137801. The next prime is 125137861. The reversal of 125137840 is 48731521.

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

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, 7942 + ... + 17701.

Almost surely, 2^125137840 is an apocalyptic number.

125137840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125137840 is an abundant number, since it is smaller than the sum of its proper divisors (170588768).

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

125137840 is a wasteful number, since it uses less digits than its factorization.

125137840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25717 (or 25711 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 125137840 is about 11186.5025812360. The cubic root of 125137840 is about 500.1837191529.

The spelling of 125137840 in words is "one hundred twenty-five million, one hundred thirty-seven thousand, eight hundred forty".