45936721 has 8 divisors (see below), whose sum is σ = 47954024. Its totient is φ = 43960320.

The previous prime is 45936707. The next prime is 45936731. The reversal of 45936721 is 12763954.

45936721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2890000 + 43046721 = 1700^2 + 6561^2 .

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 45936721 - 2⁷ = 45936593 is a prime.

It is a super-2 number, since 2×45936721² = 4220364672463682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45936731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7920 + ... + 12433.

It is an arithmetic number, because the mean of its divisors is an integer number (5994253).

Almost surely, 2^45936721 is an apocalyptic number.

It is an amenable number.

45936721 is a deficient number, since it is larger than the sum of its proper divisors (2017303).

45936721 is a wasteful number, since it uses less digits than its factorization.

45936721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20451.

The product of its digits is 45360, while the sum is 37.

The square root of 45936721 is about 6777.6633879236. The cubic root of 45936721 is about 358.1404133827.

The spelling of 45936721 in words is "forty-five million, nine hundred thirty-six thousand, seven hundred twenty-one".