125641631 has 4 divisors (see below), whose sum is σ = 125738064. Its totient is φ = 125545200.

The previous prime is 125641619. The next prime is 125641673. The reversal of 125641631 is 136146521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125641631 is a prime.

It is a super-2 number, since 2×125641631² = 31571638880680322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125641594 and 125641603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125641231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46235 + ... + 48876.

It is an arithmetic number, because the mean of its divisors is an integer number (31434516).

Almost surely, 2^125641631 is an apocalyptic number.

125641631 is a deficient number, since it is larger than the sum of its proper divisors (96433).

125641631 is an equidigital number, since it uses as much as digits as its factorization.

125641631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96432.

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

The square root of 125641631 is about 11208.9977696492. The cubic root of 125641631 is about 500.8540483722.

The spelling of 125641631 in words is "one hundred twenty-five million, six hundred forty-one thousand, six hundred thirty-one".