45028521 has 8 divisors (see below), whose sum is σ = 66708960. Its totient is φ = 30018996.

The previous prime is 45028513. The next prime is 45028531. The reversal of 45028521 is 12582054.

It is a happy number.

45028521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45028521 - 2³ = 45028513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1667723 = 45028521 / (4 + 5 + 0 + 2 + 8 + 5 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (45028531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833835 + ... + 833888.

It is an arithmetic number, because the mean of its divisors is an integer number (8338620).

Almost surely, 2^45028521 is an apocalyptic number.

It is an amenable number.

45028521 is a deficient number, since it is larger than the sum of its proper divisors (21680439).

45028521 is a wasteful number, since it uses less digits than its factorization.

45028521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667732 (or 1667726 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 45028521 is about 6710.3294255945. The cubic root of 45028521 is about 355.7644598781.

The spelling of 45028521 in words is "forty-five million, twenty-eight thousand, five hundred twenty-one".