13229257 has 4 divisors (see below), whose sum is σ = 13249476. Its totient is φ = 13209040.

The previous prime is 13229207. The next prime is 13229267. The reversal of 13229257 is 75292231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9461776 + 3767481 = 3076^2 + 1941^2 .

It is a cyclic number.

It is not a de Polignac number, because 13229257 - 2⁷ = 13229129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13229207) 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 in 3 ways as a sum of consecutive naturals, for example, 9094 + ... + 10447.

It is an arithmetic number, because the mean of its divisors is an integer number (3312369).

Almost surely, 2^13229257 is an apocalyptic number.

It is an amenable number.

13229257 is a deficient number, since it is larger than the sum of its proper divisors (20219).

13229257 is an equidigital number, since it uses as much as digits as its factorization.

13229257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20218.

The product of its digits is 7560, while the sum is 31.

The square root of 13229257 is about 3637.2045584487. The cubic root of 13229257 is about 236.5076272855.

The spelling of 13229257 in words is "thirteen million, two hundred twenty-nine thousand, two hundred fifty-seven".