45070721 has 2 divisors, whose sum is σ = 45070722. Its totient is φ = 45070720.

The previous prime is 45070693. The next prime is 45070733. The reversal of 45070721 is 12707054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41460721 + 3610000 = 6439^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 45070721 - 2⁶ = 45070657 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 (45070741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22535360 + 22535361.

It is an arithmetic number, because the mean of its divisors is an integer number (22535361).

Almost surely, 2^45070721 is an apocalyptic number.

It is an amenable number.

45070721 is a deficient number, since it is larger than the sum of its proper divisors (1).

45070721 is an equidigital number, since it uses as much as digits as its factorization.

45070721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 45070721 is about 6713.4730952019. The cubic root of 45070721 is about 355.8755640720.

Adding to 45070721 its reverse (12707054), we get a palindrome (57777775).

The spelling of 45070721 in words is "forty-five million, seventy thousand, seven hundred twenty-one".