45419921 has 2 divisors, whose sum is σ = 45419922. Its totient is φ = 45419920.

The previous prime is 45419909. The next prime is 45419947. The reversal of 45419921 is 12991454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45373696 + 46225 = 6736^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 45419921 - 2¹⁰ = 45418897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45419821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22709960 + 22709961.

It is an arithmetic number, because the mean of its divisors is an integer number (22709961).

Almost surely, 2^45419921 is an apocalyptic number.

It is an amenable number.

45419921 is a deficient number, since it is larger than the sum of its proper divisors (1).

45419921 is an equidigital number, since it uses as much as digits as its factorization.

45419921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 45419921 is about 6739.4303171707. The cubic root of 45419921 is about 356.7922876374.

The spelling of 45419921 in words is "forty-five million, four hundred nineteen thousand, nine hundred twenty-one".