13212291 has 16 divisors (see below), whose sum is σ = 18184320. Its totient is φ = 8527680.

The previous prime is 13212289. The next prime is 13212307. The reversal of 13212291 is 19221231.

It is not a de Polignac number, because 13212291 - 2¹ = 13212289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13212491) 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 in 15 ways as a sum of consecutive naturals, for example, 19720 + ... + 20378.

It is an arithmetic number, because the mean of its divisors is an integer number (1136520).

Almost surely, 2^13212291 is an apocalyptic number.

13212291 is a deficient number, since it is larger than the sum of its proper divisors (4972029).

13212291 is a wasteful number, since it uses less digits than its factorization.

13212291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866.

The product of its digits is 216, while the sum is 21.

The square root of 13212291 is about 3634.8715245521. The cubic root of 13212291 is about 236.4064801348.

The spelling of 13212291 in words is "thirteen million, two hundred twelve thousand, two hundred ninety-one".