12225491 has 2 divisors, whose sum is σ = 12225492. Its totient is φ = 12225490.

The previous prime is 12225463. The next prime is 12225527. The reversal of 12225491 is 19452221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12225491 - 2⁶ = 12225427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12225491.

It is not a weakly prime, because it can be changed into another prime (12225461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6112745 + 6112746.

It is an arithmetic number, because the mean of its divisors is an integer number (6112746).

Almost surely, 2^12225491 is an apocalyptic number.

12225491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12225491 is an equidigital number, since it uses as much as digits as its factorization.

12225491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 12225491 is about 3496.4969612456. The cubic root of 12225491 is about 230.3679742953.

The spelling of 12225491 in words is "twelve million, two hundred twenty-five thousand, four hundred ninety-one".