12621197 has 2 divisors, whose sum is σ = 12621198. Its totient is φ = 12621196.

The previous prime is 12621163. The next prime is 12621241. The reversal of 12621197 is 79112621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7150276 + 5470921 = 2674^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 12621197 - 2²² = 8426893 is a prime.

It is a super-2 number, since 2×12621197² = 318589227425618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

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, 6310598 + 6310599.

It is an arithmetic number, because the mean of its divisors is an integer number (6310599).

Almost surely, 2^12621197 is an apocalyptic number.

It is an amenable number.

12621197 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621197 is an equidigital number, since it uses as much as digits as its factorization.

12621197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 29.

The square root of 12621197 is about 3552.6324042884. The cubic root of 12621197 is about 232.8270927027.

The spelling of 12621197 in words is "twelve million, six hundred twenty-one thousand, one hundred ninety-seven".