45292721 has 2 divisors, whose sum is σ = 45292722. Its totient is φ = 45292720.

The previous prime is 45292711. The next prime is 45292729. The reversal of 45292721 is 12729254.

45292721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43230625 + 2062096 = 6575^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 45292721 - 2¹⁸ = 45030577 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (45292729) 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 as a sum of consecutive naturals, namely, 22646360 + 22646361.

It is an arithmetic number, because the mean of its divisors is an integer number (22646361).

Almost surely, 2^45292721 is an apocalyptic number.

It is an amenable number.

45292721 is a deficient number, since it is larger than the sum of its proper divisors (1).

45292721 is an equidigital number, since it uses as much as digits as its factorization.

45292721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 45292721 is about 6729.9867013242. The cubic root of 45292721 is about 356.4589066709.

The spelling of 45292721 in words is "forty-five million, two hundred ninety-two thousand, seven hundred twenty-one".