125171840 has 32 divisors (see below), whose sum is σ = 299240460. Its totient is φ = 50068480.

The previous prime is 125171821. The next prime is 125171869. The reversal of 125171840 is 48171521.

It can be written as a sum of positive squares in 2 ways, for example, as 123121216 + 2050624 = 11096^2 + 1432^2 .

It is a tau number, because it is divible by the number of its divisors (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, 97151 + ... + 98430.

Almost surely, 2^125171840 is an apocalyptic number.

125171840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125171840 is an abundant number, since it is smaller than the sum of its proper divisors (174068620).

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

125171840 is an equidigital number, since it uses as much as digits as its factorization.

125171840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195600 (or 195588 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 125171840 is about 11188.0221665851. The cubic root of 125171840 is about 500.2290150882.

The spelling of 125171840 in words is "one hundred twenty-five million, one hundred seventy-one thousand, eight hundred forty".