125784520 has 16 divisors (see below), whose sum is σ = 283015260. Its totient is φ = 50313792.

The previous prime is 125784499. The next prime is 125784551. The reversal of 125784520 is 25487521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107619876 + 18164644 = 10374^2 + 4262^2 .

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, 1572267 + ... + 1572346.

Almost surely, 2^125784520 is an apocalyptic number.

125784520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125784520 is an abundant number, since it is smaller than the sum of its proper divisors (157230740).

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

125784520 is a wasteful number, since it uses less digits than its factorization.

125784520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144624 (or 3144620 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 125784520 is about 11215.3698111119. The cubic root of 125784520 is about 501.0438459215.

The spelling of 125784520 in words is "one hundred twenty-five million, seven hundred eighty-four thousand, five hundred twenty".