45364721 has 8 divisors (see below), whose sum is σ = 48096360. Its totient is φ = 42640128.

The previous prime is 45364703. The next prime is 45364727. The reversal of 45364721 is 12746354.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 44823025 = 736^2 + 6695^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 45364721 - 2²² = 41170417 is a prime.

It is a super-2 number, since 2×45364721² = 4115915822815682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45364727) 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, 17795 + ... + 20183.

It is an arithmetic number, because the mean of its divisors is an integer number (6012045).

Almost surely, 2^45364721 is an apocalyptic number.

It is an amenable number.

45364721 is a deficient number, since it is larger than the sum of its proper divisors (2731639).

45364721 is a wasteful number, since it uses less digits than its factorization.

45364721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523.

The product of its digits is 20160, while the sum is 32.

The square root of 45364721 is about 6735.3337704972. Note that the first 3 decimals coincide. The cubic root of 45364721 is about 356.6476894242.

The spelling of 45364721 in words is "forty-five million, three hundred sixty-four thousand, seven hundred twenty-one".