125711720 has 16 divisors (see below), whose sum is σ = 282851460. Its totient is φ = 50284672.

The previous prime is 125711687. The next prime is 125711731. The reversal of 125711720 is 27117521.

It can be written as a sum of positive squares in 2 ways, for example, as 115304644 + 10407076 = 10738^2 + 3226^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125711720.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571357 + ... + 1571436.

Almost surely, 2^125711720 is an apocalyptic number.

125711720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125711720 is an abundant number, since it is smaller than the sum of its proper divisors (157139740).

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

125711720 is a wasteful number, since it uses less digits than its factorization.

125711720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142804 (or 3142800 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 125711720 is about 11212.1237952495. The cubic root of 125711720 is about 500.9471646254.

The spelling of 125711720 in words is "one hundred twenty-five million, seven hundred eleven thousand, seven hundred twenty".