125171388 has 18 divisors (see below), whose sum is σ = 316405544. Its totient is φ = 41723784.

The previous prime is 125171369. The next prime is 125171393. The reversal of 125171388 is 883171521.

125171388 is a `hidden beast` number, since 1 + 2 + 517 + 138 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3476983 = 125171388 / (1 + 2 + 5 + 1 + 7 + 1 + 3 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1738456 + ... + 1738527.

Almost surely, 2^125171388 is an apocalyptic number.

125171388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

125171388 is an abundant number, since it is smaller than the sum of its proper divisors (191234156).

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

125171388 is a wasteful number, since it uses less digits than its factorization.

125171388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3476993 (or 3476988 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 125171388 is about 11188.0019663924. The cubic root of 125171388 is about 500.2284129725.

The spelling of 125171388 in words is "one hundred twenty-five million, one hundred seventy-one thousand, three hundred eighty-eight".