125515720 has 48 divisors (see below), whose sum is σ = 310429980. Its totient is φ = 45640320.

The previous prime is 125515711. The next prime is 125515727. The reversal of 125515720 is 27515521.

It can be written as a sum of positive squares in 2 ways, for example, as 119552356 + 5963364 = 10934^2 + 2442^2 .

It is not an unprimeable number, because it can be changed into a prime (125515727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8127 + ... + 17806.

Almost surely, 2^125515720 is an apocalyptic number.

125515720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125515720 is an abundant number, since it is smaller than the sum of its proper divisors (184914260).

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

125515720 is a wasteful number, since it uses less digits than its factorization.

125515720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25966 (or 25951 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 125515720 is about 11203.3798471711. The cubic root of 125515720 is about 500.6866831674.

The spelling of 125515720 in words is "one hundred twenty-five million, five hundred fifteen thousand, seven hundred twenty".