45037621 has 4 divisors (see below), whose sum is σ = 46254892. Its totient is φ = 43820352.

The previous prime is 45037613. The next prime is 45037631. The reversal of 45037621 is 12673054.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40259025 + 4778596 = 6345^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 45037621 - 2³ = 45037613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45037621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45037631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608580 + ... + 608653.

It is an arithmetic number, because the mean of its divisors is an integer number (11563723).

Almost surely, 2^45037621 is an apocalyptic number.

It is an amenable number.

45037621 is a deficient number, since it is larger than the sum of its proper divisors (1217271).

45037621 is a wasteful number, since it uses less digits than its factorization.

45037621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217270.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 45037621 is about 6711.0074504503. The cubic root of 45037621 is about 355.7884242341.

The spelling of 45037621 in words is "forty-five million, thirty-seven thousand, six hundred twenty-one".