13257226 has 4 divisors (see below), whose sum is σ = 19885842. Its totient is φ = 6628612.

The previous prime is 13257221. The next prime is 13257253. The reversal of 13257226 is 62275231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62275231 = 2099 ⋅29669.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 1320201 = 3455^2 + 1149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13257194 and 13257203.

It is not an unprimeable number, because it can be changed into a prime (13257221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314305 + ... + 3314308.

Almost surely, 2^13257226 is an apocalyptic number.

13257226 is a deficient number, since it is larger than the sum of its proper divisors (6628616).

13257226 is an equidigital number, since it uses as much as digits as its factorization.

13257226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628615.

The product of its digits is 5040, while the sum is 28.

The square root of 13257226 is about 3641.0473767860. The cubic root of 13257226 is about 236.6741830142.

The spelling of 13257226 in words is "thirteen million, two hundred fifty-seven thousand, two hundred twenty-six".