45180621 has 6 divisors (see below), whose sum is σ = 65260910. Its totient is φ = 30120408.

The previous prime is 45180617. The next prime is 45180661. The reversal of 45180621 is 12608154.

It can be written as a sum of positive squares in only one way, i.e., 42575625 + 2604996 = 6525^2 + 1614^2 .

It is not a de Polignac number, because 45180621 - 2² = 45180617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45180601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2510026 + ... + 2510043.

Almost surely, 2^45180621 is an apocalyptic number.

It is an amenable number.

45180621 is a deficient number, since it is larger than the sum of its proper divisors (20080289).

45180621 is a wasteful number, since it uses less digits than its factorization.

45180621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020075 (or 5020072 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 45180621 is about 6721.6531448744. The cubic root of 45180621 is about 356.1645837693.

Adding to 45180621 its reverse (12608154), we get a palindrome (57788775).

The spelling of 45180621 in words is "forty-five million, one hundred eighty thousand, six hundred twenty-one".