45021253 has 24 divisors (see below), whose sum is σ = 51172992. Its totient is φ = 39443712.

The previous prime is 45021227. The next prime is 45021257. The reversal of 45021253 is 35212054.

It is not a de Polignac number, because 45021253 - 2⁹ = 45020741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45021257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 671926 + ... + 671992.

It is an arithmetic number, because the mean of its divisors is an integer number (2132208).

Almost surely, 2^45021253 is an apocalyptic number.

It is an amenable number.

45021253 is a deficient number, since it is larger than the sum of its proper divisors (6151739).

45021253 is a wasteful number, since it uses less digits than its factorization.

45021253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 45021253 is about 6709.7878505956. The cubic root of 45021253 is about 355.7453176754.

The spelling of 45021253 in words is "forty-five million, twenty-one thousand, two hundred fifty-three".