6442957 has 4 divisors (see below), whose sum is σ = 6782080. Its totient is φ = 6103836.

The previous prime is 6442939. The next prime is 6442979. The reversal of 6442957 is 7592446.

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: 7592446 = 2 ⋅3796223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442957 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169533 + ... + 169570.

It is an arithmetic number, because the mean of its divisors is an integer number (1695520).

Almost surely, 2^6442957 is an apocalyptic number.

It is an amenable number.

6442957 is a deficient number, since it is larger than the sum of its proper divisors (339123).

6442957 is a wasteful number, since it uses less digits than its factorization.

6442957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339122.

The product of its digits is 60480, while the sum is 37.

The square root of 6442957 is about 2538.2980518450. The cubic root of 6442957 is about 186.0780206080.

The spelling of 6442957 in words is "six million, four hundred forty-two thousand, nine hundred fifty-seven".