13212491 has 2 divisors, whose sum is σ = 13212492. Its totient is φ = 13212490.

The previous prime is 13212443. The next prime is 13212523. The reversal of 13212491 is 19421231.

It is a strong prime.

It is an emirp because it is prime and its reverse (19421231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13212491 - 2⁶ = 13212427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13212431) 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, 6606245 + 6606246.

It is an arithmetic number, because the mean of its divisors is an integer number (6606246).

Almost surely, 2^13212491 is an apocalyptic number.

13212491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212491 is an equidigital number, since it uses as much as digits as its factorization.

13212491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 23.

The square root of 13212491 is about 3634.8990357368. The cubic root of 13212491 is about 236.4076729902.

The spelling of 13212491 in words is "thirteen million, two hundred twelve thousand, four hundred ninety-one".