125617280 has 32 divisors (see below), whose sum is σ = 300305340. Its totient is φ = 50246656.

The previous prime is 125617277. The next prime is 125617309. The reversal of 125617280 is 82716521.

It can be written as a sum of positive squares in 2 ways, for example, as 123832384 + 1784896 = 11128^2 + 1336^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 97499 + ... + 98778.

Almost surely, 2^125617280 is an apocalyptic number.

125617280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125617280 is an abundant number, since it is smaller than the sum of its proper divisors (174688060).

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

125617280 is an equidigital number, since it uses as much as digits as its factorization.

125617280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196296 (or 196284 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 125617280 is about 11207.9114914421. The cubic root of 125617280 is about 500.8216889149.

The spelling of 125617280 in words is "one hundred twenty-five million, six hundred seventeen thousand, two hundred eighty".