45475021 has 2 divisors, whose sum is σ = 45475022. Its totient is φ = 45475020.

The previous prime is 45475019. The next prime is 45475033. The reversal of 45475021 is 12057454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37380996 + 8094025 = 6114^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 45475021 - 2¹ = 45475019 is a prime.

Together with 45475019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45475061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22737510 + 22737511.

It is an arithmetic number, because the mean of its divisors is an integer number (22737511).

Almost surely, 2^45475021 is an apocalyptic number.

It is an amenable number.

45475021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45475021 is an equidigital number, since it uses as much as digits as its factorization.

45475021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 45475021 is about 6743.5169607557. The cubic root of 45475021 is about 356.9365071066.

The spelling of 45475021 in words is "forty-five million, four hundred seventy-five thousand, twenty-one".