13042857 has 4 divisors (see below), whose sum is σ = 17390480. Its totient is φ = 8695236.

The previous prime is 13042853. The next prime is 13042891. The reversal of 13042857 is 75824031.

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 not a de Polignac number, because 13042857 - 2² = 13042853 is a prime.

It is a super-2 number, since 2×13042857² = 340232237444898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13042853) 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, 2173807 + ... + 2173812.

It is an arithmetic number, because the mean of its divisors is an integer number (4347620).

Almost surely, 2^13042857 is an apocalyptic number.

It is an amenable number.

13042857 is a deficient number, since it is larger than the sum of its proper divisors (4347623).

13042857 is an equidigital number, since it uses as much as digits as its factorization.

13042857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347622.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 13042857 is about 3611.4895818762. The cubic root of 13042857 is about 235.3915729155.

Adding to 13042857 its reverse (75824031), we get a palindrome (88866888).

The spelling of 13042857 in words is "thirteen million, forty-two thousand, eight hundred fifty-seven".