4521644 has 24 divisors (see below), whose sum is σ = 8232000. Its totient is φ = 2171520.

The previous prime is 4521637. The next prime is 4521653. The reversal of 4521644 is 4461254.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12782 + ... + 13130.

It is an arithmetic number, because the mean of its divisors is an integer number (343000).

Almost surely, 2^4521644 is an apocalyptic number.

It is an amenable number.

4521644 is a deficient number, since it is larger than the sum of its proper divisors (3710356).

4521644 is a wasteful number, since it uses less digits than its factorization.

4521644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 471 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 4521644 is about 2126.4157636737. The cubic root of 4521644 is about 165.3606314765.

Adding to 4521644 its reverse (4461254), we get a palindrome (8982898).

The spelling of 4521644 in words is "four million, five hundred twenty-one thousand, six hundred forty-four".