125506631 has 12 divisors (see below), whose sum is σ = 137634240. Its totient is φ = 114305280.

The previous prime is 125506621. The next prime is 125506657. The reversal of 125506631 is 136605521.

It is not a de Polignac number, because 125506631 - 2¹⁰ = 125505607 is a prime.

It is a super-2 number, since 2×125506631² = 31503828849940322, 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 = 125506594 and 125506603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125506621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1955 + ... + 15963.

It is an arithmetic number, because the mean of its divisors is an integer number (11469520).

Almost surely, 2^125506631 is an apocalyptic number.

125506631 is a deficient number, since it is larger than the sum of its proper divisors (12127609).

125506631 is a wasteful number, since it uses less digits than its factorization.

125506631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14074 (or 14057 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 125506631 is about 11202.9742033087. The cubic root of 125506631 is about 500.6745974273.

The spelling of 125506631 in words is "one hundred twenty-five million, five hundred six thousand, six hundred thirty-one".