12662491 has 2 divisors, whose sum is σ = 12662492. Its totient is φ = 12662490.

The previous prime is 12662453. The next prime is 12662509. The reversal of 12662491 is 19426621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12662491 - 2²¹ = 10565339 is a prime.

It is not a weakly prime, because it can be changed into another prime (12662401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6331245 + 6331246.

It is an arithmetic number, because the mean of its divisors is an integer number (6331246).

Almost surely, 2^12662491 is an apocalyptic number.

12662491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12662491 is an equidigital number, since it uses as much as digits as its factorization.

12662491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 12662491 is about 3558.4394051325. The cubic root of 12662491 is about 233.0807373073.

The spelling of 12662491 in words is "twelve million, six hundred sixty-two thousand, four hundred ninety-one".