125171406 has 20 divisors (see below), whose sum is σ = 280477032. Its totient is φ = 41723748.

The previous prime is 125171399. The next prime is 125171413. The reversal of 125171406 is 604171521.

It is a happy number.

125171406 is a `hidden beast` number, since 1 + 2 + 517 + 140 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (125171399) and next prime (125171413).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 125171406.

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 9 ways as a sum of consecutive naturals, for example, 386170 + ... + 386493.

Almost surely, 2^125171406 is an apocalyptic number.

125171406 is an abundant number, since it is smaller than the sum of its proper divisors (155305626).

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

125171406 is an equidigital number, since it uses as much as digits as its factorization.

125171406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772677 (or 772668 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 125171406 is about 11188.0027708255. The cubic root of 125171406 is about 500.2284369506.

The spelling of 125171406 in words is "one hundred twenty-five million, one hundred seventy-one thousand, four hundred six".