125243631 has 32 divisors (see below), whose sum is σ = 191665920. Its totient is φ = 80769312.

The previous prime is 125243621. The next prime is 125243633. The reversal of 125243631 is 136342521.

125243631 is a `hidden beast` number, since 1 + 2 + 5 + 24 + 3 + 631 = 666.

It is not a de Polignac number, because 125243631 - 2¹¹ = 125241583 is a prime.

It is a super-2 number, since 2×125243631² = 31371934212128322, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 125243595 and 125243604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125243633) 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 31 ways as a sum of consecutive naturals, for example, 282496 + ... + 282938.

It is an arithmetic number, because the mean of its divisors is an integer number (5989560).

Almost surely, 2^125243631 is an apocalyptic number.

125243631 is a deficient number, since it is larger than the sum of its proper divisors (66422289).

125243631 is a wasteful number, since it uses less digits than its factorization.

125243631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 766 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 125243631 is about 11191.2300932471. The cubic root of 125243631 is about 500.3246305178.

The spelling of 125243631 in words is "one hundred twenty-five million, two hundred forty-three thousand, six hundred thirty-one".