13125631 has 8 divisors (see below), whose sum is σ = 13381200. Its totient is φ = 12872640.

The previous prime is 13125611. The next prime is 13125653. The reversal of 13125631 is 13652131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13125631 is a prime.

It is a super-2 number, since 2×13125631² = 344564378296322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13125611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11841 + ... + 12901.

It is an arithmetic number, because the mean of its divisors is an integer number (1672650).

Almost surely, 2^13125631 is an apocalyptic number.

13125631 is a deficient number, since it is larger than the sum of its proper divisors (255569).

13125631 is a wasteful number, since it uses less digits than its factorization.

13125631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289.

The product of its digits is 540, while the sum is 22.

The square root of 13125631 is about 3622.9312717743. The cubic root of 13125631 is about 235.8884791012. Note that the first 3 decimals are identical.

Adding to 13125631 its reverse (13652131), we get a palindrome (26777762).

The spelling of 13125631 in words is "thirteen million, one hundred twenty-five thousand, six hundred thirty-one".