6442691 has 12 divisors (see below), whose sum is σ = 7100520. Its totient is φ = 5829120.

The previous prime is 6442679. The next prime is 6442697. The reversal of 6442691 is 1962446.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-6442691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442697) 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 11 ways as a sum of consecutive naturals, for example, 9731 + ... + 10371.

It is an arithmetic number, because the mean of its divisors is an integer number (591710).

Almost surely, 2^6442691 is an apocalyptic number.

6442691 is a deficient number, since it is larger than the sum of its proper divisors (657829).

6442691 is a wasteful number, since it uses less digits than its factorization.

6442691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 683 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 6442691 is about 2538.2456539902. The cubic root of 6442691 is about 186.0754598048.

The spelling of 6442691 in words is "six million, four hundred forty-two thousand, six hundred ninety-one".