12817457 has 4 divisors (see below), whose sum is σ = 13492080. Its totient is φ = 12142836.

The previous prime is 12817421. The next prime is 12817459. The reversal of 12817457 is 75471821.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12817457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817459) 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, 337283 + ... + 337320.

It is an arithmetic number, because the mean of its divisors is an integer number (3373020).

Almost surely, 2^12817457 is an apocalyptic number.

It is an amenable number.

12817457 is a deficient number, since it is larger than the sum of its proper divisors (674623).

12817457 is an equidigital number, since it uses as much as digits as its factorization.

12817457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674622.

The product of its digits is 15680, while the sum is 35.

The square root of 12817457 is about 3580.1476226547. The cubic root of 12817457 is about 234.0277136193.

The spelling of 12817457 in words is "twelve million, eight hundred seventeen thousand, four hundred fifty-seven".