12632621 has 2 divisors, whose sum is σ = 12632622. Its totient is φ = 12632620.

The previous prime is 12632617. The next prime is 12632623. The reversal of 12632621 is 12623621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8491396 + 4141225 = 2914^2 + 2035^2 .

It is an emirp because it is prime and its reverse (12623621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12632621 - 2² = 12632617 is a prime.

It is a super-2 number, since 2×12632621² = 319166226659282, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12632623, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12632623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6316310 + 6316311.

It is an arithmetic number, because the mean of its divisors is an integer number (6316311).

Almost surely, 2^12632621 is an apocalyptic number.

It is an amenable number.

12632621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12632621 is an equidigital number, since it uses as much as digits as its factorization.

12632621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 12632621 is about 3554.2398624741. The cubic root of 12632621 is about 232.8973188628.

The spelling of 12632621 in words is "twelve million, six hundred thirty-two thousand, six hundred twenty-one".