45437521 has 4 divisors (see below), whose sum is σ = 45454500. Its totient is φ = 45420544.

The previous prime is 45437507. The next prime is 45437533. The reversal of 45437521 is 12573454.

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 10497600 + 34939921 = 3240^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 45437521 - 2⁷ = 45437393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45437501) 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, 3496 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (11363625).

Almost surely, 2^45437521 is an apocalyptic number.

It is an amenable number.

45437521 is a deficient number, since it is larger than the sum of its proper divisors (16979).

45437521 is a wasteful number, since it uses less digits than its factorization.

45437521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16978.

The product of its digits is 16800, while the sum is 31.

The square root of 45437521 is about 6740.7359390500. The cubic root of 45437521 is about 356.8383667821.

The spelling of 45437521 in words is "forty-five million, four hundred thirty-seven thousand, five hundred twenty-one".