125646131 has 16 divisors (see below), whose sum is σ = 140743680. Its totient is φ = 111382560.

The previous prime is 125646119. The next prime is 125646139. The reversal of 125646131 is 131646521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125646131 - 2²⁶ = 58537267 is a prime.

It is a super-2 number, since 2×125646131² = 31573900470538322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125646094 and 125646103.

It is not an unprimeable number, because it can be changed into a prime (125646139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54896 + ... + 57138.

It is an arithmetic number, because the mean of its divisors is an integer number (8796480).

Almost surely, 2^125646131 is an apocalyptic number.

125646131 is a deficient number, since it is larger than the sum of its proper divisors (15097549).

125646131 is a wasteful number, since it uses less digits than its factorization.

125646131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426.

The product of its digits is 4320, while the sum is 29.

The square root of 125646131 is about 11209.1984994468. The cubic root of 125646131 is about 500.8600278560.

The spelling of 125646131 in words is "one hundred twenty-five million, six hundred forty-six thousand, one hundred thirty-one".