45720261 has 8 divisors (see below), whose sum is σ = 67733760. Its totient is φ = 30480156.

The previous prime is 45720247. The next prime is 45720299. The reversal of 45720261 is 16202754.

45720261 is a `hidden beast` number, since 457 + 202 + 6 + 1 = 666.

45720261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45720261 - 2⁵ = 45720229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1693343 = 45720261 / (4 + 5 + 7 + 2 + 0 + 2 + 6 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45720161) 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, 846645 + ... + 846698.

It is an arithmetic number, because the mean of its divisors is an integer number (8466720).

Almost surely, 2^45720261 is an apocalyptic number.

It is an amenable number.

45720261 is a deficient number, since it is larger than the sum of its proper divisors (22013499).

45720261 is a wasteful number, since it uses less digits than its factorization.

45720261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693352 (or 1693346 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 45720261 is about 6761.6759017273. The cubic root of 45720261 is about 357.5769922362.

The spelling of 45720261 in words is "forty-five million, seven hundred twenty thousand, two hundred sixty-one".