45121273 has 4 divisors (see below), whose sum is σ = 45861028. Its totient is φ = 44381520.

The previous prime is 45121259. The next prime is 45121291. The reversal of 45121273 is 37212154.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13446889 + 31674384 = 3667^2 + 5628^2 .

It is a cyclic number.

It is not a de Polignac number, because 45121273 - 2¹⁷ = 44990201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45121243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369786 + ... + 369907.

It is an arithmetic number, because the mean of its divisors is an integer number (11465257).

Almost surely, 2^45121273 is an apocalyptic number.

It is an amenable number.

45121273 is a deficient number, since it is larger than the sum of its proper divisors (739755).

45121273 is an equidigital number, since it uses as much as digits as its factorization.

45121273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739754.

The product of its digits is 1680, while the sum is 25.

The square root of 45121273 is about 6717.2370063889. The cubic root of 45121273 is about 356.0085661576.

The spelling of 45121273 in words is "forty-five million, one hundred twenty-one thousand, two hundred seventy-three".