45368721 has 8 divisors (see below), whose sum is σ = 67212960. Its totient is φ = 30245796.

The previous prime is 45368707. The next prime is 45368737. The reversal of 45368721 is 12786354.

It is not a de Polignac number, because 45368721 - 2⁶ = 45368657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45368621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840135 + ... + 840188.

It is an arithmetic number, because the mean of its divisors is an integer number (8401620).

Almost surely, 2^45368721 is an apocalyptic number.

It is an amenable number.

45368721 is a deficient number, since it is larger than the sum of its proper divisors (21844239).

45368721 is a wasteful number, since it uses less digits than its factorization.

45368721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680332 (or 1680326 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 45368721 is about 6735.6307054351. The cubic root of 45368721 is about 356.6581714963.

The spelling of 45368721 in words is "forty-five million, three hundred sixty-eight thousand, seven hundred twenty-one".