13972257 has 24 divisors (see below), whose sum is σ = 22544704. Its totient is φ = 8596368.

The previous prime is 13972253. The next prime is 13972261. The reversal of 13972257 is 75227931.

It is an interprime number because it is at equal distance from previous prime (13972253) and next prime (13972261).

It is not a de Polignac number, because 13972257 - 2² = 13972253 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13972253) 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 in 23 ways as a sum of consecutive naturals, for example, 948 + ... + 5370.

Almost surely, 2^13972257 is an apocalyptic number.

It is an amenable number.

13972257 is a deficient number, since it is larger than the sum of its proper divisors (8572447).

13972257 is an equidigital number, since it uses as much as digits as its factorization.

13972257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451 (or 4439 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 13972257 is about 3737.9482339915. The cubic root of 13972257 is about 240.8549197681.

The spelling of 13972257 in words is "thirteen million, nine hundred seventy-two thousand, two hundred fifty-seven".