6442631 has 4 divisors (see below), whose sum is σ = 6938232. Its totient is φ = 5947032.

The previous prime is 6442613. The next prime is 6442633. The reversal of 6442631 is 1362446.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6442631 - 2⁶ = 6442567 is a prime.

It is a super-2 number, since 2×6442631² = 83014988404322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6442631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442633) 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 3 ways as a sum of consecutive naturals, for example, 247781 + ... + 247806.

It is an arithmetic number, because the mean of its divisors is an integer number (1734558).

Almost surely, 2^6442631 is an apocalyptic number.

6442631 is a deficient number, since it is larger than the sum of its proper divisors (495601).

6442631 is a wasteful number, since it uses less digits than its factorization.

6442631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495600.

The product of its digits is 3456, while the sum is 26.

The square root of 6442631 is about 2538.2338347757. The cubic root of 6442631 is about 186.0748821702.

The spelling of 6442631 in words is "six million, four hundred forty-two thousand, six hundred thirty-one".