13312257 has 16 divisors (see below), whose sum is σ = 20338560. Its totient is φ = 7587072.

The previous prime is 13312253. The next prime is 13312261. The reversal of 13312257 is 75221331.

It is an interprime number because it is at equal distance from previous prime (13312253) and next prime (13312261).

It is not a de Polignac number, because 13312257 - 2² = 13312253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13312253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11919 + ... + 12987.

It is an arithmetic number, because the mean of its divisors is an integer number (1271160).

Almost surely, 2^13312257 is an apocalyptic number.

It is an amenable number.

13312257 is a deficient number, since it is larger than the sum of its proper divisors (7026303).

13312257 is a wasteful number, since it uses less digits than its factorization.

13312257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its digits is 1260, while the sum is 24.

The square root of 13312257 is about 3648.5965795083. The cubic root of 13312257 is about 237.0012106260.

Adding to 13312257 its reverse (75221331), we get a palindrome (88533588).

The spelling of 13312257 in words is "thirteen million, three hundred twelve thousand, two hundred fifty-seven".