12621137 has 2 divisors, whose sum is σ = 12621138. Its totient is φ = 12621136.

The previous prime is 12621127. The next prime is 12621143. The reversal of 12621137 is 73112621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 5271616 = 2711^2 + 2296^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621137 - 2⁴ = 12621121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12621127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310568 + 6310569.

It is an arithmetic number, because the mean of its divisors is an integer number (6310569).

Almost surely, 2^12621137 is an apocalyptic number.

It is an amenable number.

12621137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621137 is an equidigital number, since it uses as much as digits as its factorization.

12621137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 12621137 is about 3552.6239598359. The cubic root of 12621137 is about 232.8267237560.

Adding to 12621137 its reverse (73112621), we get a palindrome (85733758).

The spelling of 12621137 in words is "twelve million, six hundred twenty-one thousand, one hundred thirty-seven".