13255861 has 2 divisors, whose sum is σ = 13255862. Its totient is φ = 13255860.

The previous prime is 13255841. The next prime is 13255873. The reversal of 13255861 is 16855231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 78961 = 3630^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 13255861 - 2⁵ = 13255829 is a prime.

It is equal to p₈₆₄₈₁₄ and since 13255861 and 864814 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13255831) 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 as a sum of consecutive naturals, namely, 6627930 + 6627931.

It is an arithmetic number, because the mean of its divisors is an integer number (6627931).

Almost surely, 2^13255861 is an apocalyptic number.

It is an amenable number.

13255861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13255861 is an equidigital number, since it uses as much as digits as its factorization.

13255861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 13255861 is about 3640.8599258966. The cubic root of 13255861 is about 236.6660598631. Note that the first 3 decimals are identical.

The spelling of 13255861 in words is "thirteen million, two hundred fifty-five thousand, eight hundred sixty-one".