45721057 has 2 divisors, whose sum is σ = 45721058. Its totient is φ = 45721056.

The previous prime is 45721051. The next prime is 45721073. The reversal of 45721057 is 75012754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44502241 + 1218816 = 6671^2 + 1104^2 .

It is a cyclic number.

It is not a de Polignac number, because 45721057 - 2¹⁵ = 45688289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45721051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22860528 + 22860529.

It is an arithmetic number, because the mean of its divisors is an integer number (22860529).

Almost surely, 2^45721057 is an apocalyptic number.

It is an amenable number.

45721057 is a deficient number, since it is larger than the sum of its proper divisors (1).

45721057 is an equidigital number, since it uses as much as digits as its factorization.

45721057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 45721057 is about 6761.7347626182. The cubic root of 45721057 is about 357.5790673894.

The spelling of 45721057 in words is "forty-five million, seven hundred twenty-one thousand, fifty-seven".