6423645 has 16 divisors (see below), whose sum is σ = 10632960. Its totient is φ = 3307584.

The previous prime is 6423643. The next prime is 6423649. The reversal of 6423645 is 5463246.

It is not a de Polignac number, because 6423645 - 2¹ = 6423643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6949 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (664560).

Almost surely, 2^6423645 is an apocalyptic number.

It is an amenable number.

6423645 is a deficient number, since it is larger than the sum of its proper divisors (4209315).

6423645 is a wasteful number, since it uses less digits than its factorization.

6423645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804.

The product of its digits is 17280, while the sum is 30.

The square root of 6423645 is about 2534.4910731743. The cubic root of 6423645 is about 185.8919189403.

The spelling of 6423645 in words is "six million, four hundred twenty-three thousand, six hundred forty-five".