13967257 has 4 divisors (see below), whose sum is σ = 14040576. Its totient is φ = 13893940.

The previous prime is 13967237. The next prime is 13967269. The reversal of 13967257 is 75276931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75276931 = 2683 ⋅28057.

It is a cyclic number.

It is not a de Polignac number, because 13967257 - 2¹⁵ = 13934489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13967237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36373 + ... + 36754.

It is an arithmetic number, because the mean of its divisors is an integer number (3510144).

Almost surely, 2^13967257 is an apocalyptic number.

It is an amenable number.

13967257 is a deficient number, since it is larger than the sum of its proper divisors (73319).

13967257 is an equidigital number, since it uses as much as digits as its factorization.

13967257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73318.

The product of its digits is 79380, while the sum is 40.

The square root of 13967257 is about 3737.2793580357. The cubic root of 13967257 is about 240.8261862028.

The spelling of 13967257 in words is "thirteen million, nine hundred sixty-seven thousand, two hundred fifty-seven".