12611957 has 2 divisors, whose sum is σ = 12611958. Its totient is φ = 12611956.

The previous prime is 12611939. The next prime is 12611987. The reversal of 12611957 is 75911621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7349521 + 5262436 = 2711^2 + 2294^2 .

It is a cyclic number.

It is not a de Polignac number, because 12611957 - 2¹⁰ = 12610933 is a prime.

It is a super-2 number, since 2×12611957² = 318122918739698, 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 (12611917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6305978 + 6305979.

It is an arithmetic number, because the mean of its divisors is an integer number (6305979).

Almost surely, 2^12611957 is an apocalyptic number.

It is an amenable number.

12611957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12611957 is an equidigital number, since it uses as much as digits as its factorization.

12611957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 12611957 is about 3551.3317220446. The cubic root of 12611957 is about 232.7702611268.

The spelling of 12611957 in words is "twelve million, six hundred eleven thousand, nine hundred fifty-seven".