45744521 has 4 divisors (see below), whose sum is σ = 46216212. Its totient is φ = 45272832.

The previous prime is 45744509. The next prime is 45744527. The reversal of 45744521 is 12544754.

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 8094025 + 37650496 = 2845^2 + 6136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45744521 is a prime.

It is a super-2 number, since 2×45744521² = 4185122403038882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45744527) 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, 235700 + ... + 235893.

It is an arithmetic number, because the mean of its divisors is an integer number (11554053).

Almost surely, 2^45744521 is an apocalyptic number.

It is an amenable number.

45744521 is a deficient number, since it is larger than the sum of its proper divisors (471691).

45744521 is an equidigital number, since it uses as much as digits as its factorization.

45744521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471690.

The product of its digits is 22400, while the sum is 32.

The square root of 45744521 is about 6763.4695977730. The cubic root of 45744521 is about 357.6402266663.

The spelling of 45744521 in words is "forty-five million, seven hundred forty-four thousand, five hundred twenty-one".