125306631 has 12 divisors (see below), whose sum is σ = 181269400. Its totient is φ = 83412720.

The previous prime is 125306591. The next prime is 125306633. The reversal of 125306631 is 136603521.

125306631 is a `hidden beast` number, since 1 + 25 + 3 + 0 + 6 + 631 = 666.

It is not a de Polignac number, because 125306631 - 2²¹ = 123209479 is a prime.

It is a super-2 number, since 2×125306631² = 31403503545140322, 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 = 125306595 and 125306604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125306633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3856 + ... + 16293.

Almost surely, 2^125306631 is an apocalyptic number.

125306631 is a deficient number, since it is larger than the sum of its proper divisors (55962769).

125306631 is a wasteful number, since it uses less digits than its factorization.

125306631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20846 (or 20843 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 125306631 is about 11194.0444433636. The cubic root of 125306631 is about 500.4085074857.

The spelling of 125306631 in words is "one hundred twenty-five million, three hundred six thousand, six hundred thirty-one".