12165631 has 2 divisors, whose sum is σ = 12165632. Its totient is φ = 12165630.

The previous prime is 12165619. The next prime is 12165661. The reversal of 12165631 is 13656121.

It is a weak prime.

It is an emirp because it is prime and its reverse (13656121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12165631 - 2¹⁷ = 12034559 is a prime.

It is a super-2 number, since 2×12165631² = 296005155256322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12165596 and 12165605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12165661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082815 + 6082816.

It is an arithmetic number, because the mean of its divisors is an integer number (6082816).

Almost surely, 2^12165631 is an apocalyptic number.

12165631 is a deficient number, since it is larger than the sum of its proper divisors (1).

12165631 is an equidigital number, since it uses as much as digits as its factorization.

12165631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 12165631 is about 3487.9264613807. The cubic root of 12165631 is about 229.9913733374.

The spelling of 12165631 in words is "twelve million, one hundred sixty-five thousand, six hundred thirty-one".