45039921 has 8 divisors (see below), whose sum is σ = 60177504. Its totient is φ = 29964480.

The previous prime is 45039889. The next prime is 45039941. The reversal of 45039921 is 12993054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45039921 - 2⁵ = 45039889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45039941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13816 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (7522188).

Almost surely, 2^45039921 is an apocalyptic number.

It is an amenable number.

45039921 is a deficient number, since it is larger than the sum of its proper divisors (15137583).

45039921 is a wasteful number, since it uses less digits than its factorization.

45039921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31071.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 45039921 is about 6711.1788085254. The cubic root of 45039921 is about 355.7944806482.

The spelling of 45039921 in words is "forty-five million, thirty-nine thousand, nine hundred twenty-one".