6442523 has 4 divisors (see below), whose sum is σ = 6456240. Its totient is φ = 6428808.

The previous prime is 6442493. The next prime is 6442531. The reversal of 6442523 is 3252446.

6442523 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 6442523 - 2⁶ = 6442459 is a prime.

It is a super-2 number, since 2×6442523² = 83012205211058, 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 = 6442492 and 6442501.

It is not an unprimeable number, because it can be changed into a prime (6442573) 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, 6128 + ... + 7101.

It is an arithmetic number, because the mean of its divisors is an integer number (1614060).

Almost surely, 2^6442523 is an apocalyptic number.

6442523 is a deficient number, since it is larger than the sum of its proper divisors (13717).

6442523 is a wasteful number, since it uses less digits than its factorization.

6442523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13716.

The product of its digits is 5760, while the sum is 26.

The square root of 6442523 is about 2538.2125600509. The cubic root of 6442523 is about 186.0738424191.

Adding to 6442523 its reverse (3252446), we get a palindrome (9694969).

The spelling of 6442523 in words is "six million, four hundred forty-two thousand, five hundred twenty-three".