15266891 has 2 divisors, whose sum is σ = 15266892. Its totient is φ = 15266890.

The previous prime is 15266851. The next prime is 15266921. The reversal of 15266891 is 19866251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15266891 - 2²² = 11072587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15266831) 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, 7633445 + 7633446.

It is an arithmetic number, because the mean of its divisors is an integer number (7633446).

Almost surely, 2^15266891 is an apocalyptic number.

15266891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15266891 is an equidigital number, since it uses as much as digits as its factorization.

15266891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 15266891 is about 3907.2869103766. The cubic root of 15266891 is about 248.0753055650.

The spelling of 15266891 in words is "fifteen million, two hundred sixty-six thousand, eight hundred ninety-one".