6442023 has 8 divisors (see below), whose sum is σ = 9816448. Its totient is φ = 3681144.

The previous prime is 6442021. The next prime is 6442039. The reversal of 6442023 is 3202446.

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

It is not a de Polignac number, because 6442023 - 2¹ = 6442021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 306763 = 6442023 / (6 + 4 + 4 + 2 + 0 + 2 + 3).

It is a Duffinian number.

6442023 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442021) 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, 153361 + ... + 153402.

It is an arithmetic number, because the mean of its divisors is an integer number (1227056).

Almost surely, 2^6442023 is an apocalyptic number.

6442023 is a deficient number, since it is larger than the sum of its proper divisors (3374425).

6442023 is a wasteful number, since it uses less digits than its factorization.

6442023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306773.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 6442023 is about 2538.1140636307. The cubic root of 6442023 is about 186.0690286048.

Adding to 6442023 its reverse (3202446), we get a palindrome (9644469).

The spelling of 6442023 in words is "six million, four hundred forty-two thousand, twenty-three".