12961867 has 2 divisors, whose sum is σ = 12961868. Its totient is φ = 12961866.

The previous prime is 12961849. The next prime is 12961901. The reversal of 12961867 is 76816921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12961867 - 2¹¹ = 12959819 is a prime.

It is a super-2 number, since 2×12961867² = 336019992251378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12961367) 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, 6480933 + 6480934.

It is an arithmetic number, because the mean of its divisors is an integer number (6480934).

Almost surely, 2^12961867 is an apocalyptic number.

12961867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12961867 is an equidigital number, since it uses as much as digits as its factorization.

12961867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 12961867 is about 3600.2592962174. The cubic root of 12961867 is about 234.9033373389.

The spelling of 12961867 in words is "twelve million, nine hundred sixty-one thousand, eight hundred sixty-seven".