45003621 has 16 divisors (see below), whose sum is σ = 66850560. Its totient is φ = 26738880.

The previous prime is 45003601. The next prime is 45003631. The reversal of 45003621 is 12630054.

It is a happy number.

It is not a de Polignac number, because 45003621 - 2⁵ = 45003589 is a prime.

It is a super-2 number, since 2×45003621² = 4050651806223282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45003601) 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, 18765 + ... + 21026.

It is an arithmetic number, because the mean of its divisors is an integer number (4178160).

Almost surely, 2^45003621 is an apocalyptic number.

It is an amenable number.

45003621 is a deficient number, since it is larger than the sum of its proper divisors (21846939).

45003621 is a wasteful number, since it uses less digits than its factorization.

45003621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39836.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 45003621 is about 6708.4738204751. The cubic root of 45003621 is about 355.6988705714.

Adding to 45003621 its reverse (12630054), we get a palindrome (57633675).

The spelling of 45003621 in words is "forty-five million, three thousand, six hundred twenty-one".