12361631 has 4 divisors (see below), whose sum is σ = 12368664. Its totient is φ = 12354600.

The previous prime is 12361619. The next prime is 12361651. The reversal of 12361631 is 13616321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12361631 is a prime.

It is a super-2 number, since 2×12361631² = 305619841960322, 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 = 12361597 and 12361606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12361651) 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 3 ways as a sum of consecutive naturals, for example, 1721 + ... + 5261.

It is an arithmetic number, because the mean of its divisors is an integer number (3092166).

Almost surely, 2^12361631 is an apocalyptic number.

12361631 is a deficient number, since it is larger than the sum of its proper divisors (7033).

12361631 is an equidigital number, since it uses as much as digits as its factorization.

12361631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032.

The product of its digits is 648, while the sum is 23.

The square root of 12361631 is about 3515.9111194682. The cubic root of 12361631 is about 231.2199263545.

Adding to 12361631 its reverse (13616321), we get a palindrome (25977952).

It can be divided in two parts, 1 and 2361631, that added together give a palindrome (2361632).

The spelling of 12361631 in words is "twelve million, three hundred sixty-one thousand, six hundred thirty-one".