45249021 has 6 divisors (see below), whose sum is σ = 65359710. Its totient is φ = 30166008.

The previous prime is 45249011. The next prime is 45249023. The reversal of 45249021 is 12094254.

It can be written as a sum of positive squares in only one way, i.e., 37380996 + 7868025 = 6114^2 + 2805^2 .

It is not a de Polignac number, because 45249021 - 2⁵ = 45248989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45249023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2513826 + ... + 2513843.

It is an arithmetic number, because the mean of its divisors is an integer number (10893285).

Almost surely, 2^45249021 is an apocalyptic number.

It is an amenable number.

45249021 is a deficient number, since it is larger than the sum of its proper divisors (20110689).

45249021 is a wasteful number, since it uses less digits than its factorization.

45249021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027675 (or 5027672 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 45249021 is about 6726.7392546463. The cubic root of 45249021 is about 356.3442284446.

The spelling of 45249021 in words is "forty-five million, two hundred forty-nine thousand, twenty-one".