12961279 has 2 divisors, whose sum is σ = 12961280. Its totient is φ = 12961278.

The previous prime is 12961253. The next prime is 12961303. The reversal of 12961279 is 97216921.

It is a strong prime.

It is an emirp because it is prime and its reverse (97216921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12961279 - 2¹¹ = 12959231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12961079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6480639 + 6480640.

It is an arithmetic number, because the mean of its divisors is an integer number (6480640).

Almost surely, 2^12961279 is an apocalyptic number.

12961279 is a deficient number, since it is larger than the sum of its proper divisors (1).

12961279 is an equidigital number, since it uses as much as digits as its factorization.

12961279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 12961279 is about 3600.1776345064. The cubic root of 12961279 is about 234.8997852464.

The spelling of 12961279 in words is "twelve million, nine hundred sixty-one thousand, two hundred seventy-nine".