12938257 has 4 divisors (see below), whose sum is σ = 12994020. Its totient is φ = 12882496.

The previous prime is 12938249. The next prime is 12938273. The reversal of 12938257 is 75283921.

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 938961 + 11999296 = 969^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 12938257 - 2³ = 12938249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12930257) 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, 27532 + ... + 27997.

It is an arithmetic number, because the mean of its divisors is an integer number (3248505).

Almost surely, 2^12938257 is an apocalyptic number.

It is an amenable number.

12938257 is a deficient number, since it is larger than the sum of its proper divisors (55763).

12938257 is an equidigital number, since it uses as much as digits as its factorization.

12938257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55762.

The product of its digits is 30240, while the sum is 37.

The square root of 12938257 is about 3596.9788712196. The cubic root of 12938257 is about 234.7606254238.

The spelling of 12938257 in words is "twelve million, nine hundred thirty-eight thousand, two hundred fifty-seven".