6442131 has 8 divisors (see below), whose sum is σ = 8789440. Its totient is φ = 4194792.

The previous prime is 6442129. The next prime is 6442153. The reversal of 6442131 is 1312446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6442131 - 2¹ = 6442129 is a prime.

It is a super-2 number, since 2×6442131² = 83002103642322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6442098 and 6442107.

It is not an unprimeable number, because it can be changed into a prime (6442531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24841 + ... + 25098.

It is an arithmetic number, because the mean of its divisors is an integer number (1098680).

Almost surely, 2^6442131 is an apocalyptic number.

6442131 is a deficient number, since it is larger than the sum of its proper divisors (2347309).

6442131 is a wasteful number, since it uses less digits than its factorization.

6442131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49985.

The product of its digits is 576, while the sum is 21.

The square root of 6442131 is about 2538.1353391811. The cubic root of 6442131 is about 186.0700684097.

Adding to 6442131 its reverse (1312446), we get a palindrome (7754577).

It can be divided in two parts, 644 and 2131, that added together give a triangular number (2775 = T₇₄).

The spelling of 6442131 in words is "six million, four hundred forty-two thousand, one hundred thirty-one".