45121572 has 18 divisors (see below), whose sum is σ = 114057398. Its totient is φ = 15040512.

The previous prime is 45121567. The next prime is 45121667. The reversal of 45121572 is 27512154.

It can be written as a sum of positive squares in only one way, i.e., 44836416 + 285156 = 6696^2 + 534^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 626653 + ... + 626724.

Almost surely, 2^45121572 is an apocalyptic number.

It is an amenable number.

45121572 is an abundant number, since it is smaller than the sum of its proper divisors (68935826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45121572 is a wasteful number, since it uses less digits than its factorization.

45121572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253387 (or 1253382 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 45121572 is about 6717.2592625266. The cubic root of 45121572 is about 356.0093525296.

It can be divided in two parts, 4512 and 1572, that added together give a square (6084 = 78²).

The spelling of 45121572 in words is "forty-five million, one hundred twenty-one thousand, five hundred seventy-two".