45020521 has 8 divisors (see below), whose sum is σ = 55409984. Its totient is φ = 35620560.

The previous prime is 45020509. The next prime is 45020543. The reversal of 45020521 is 12502054.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45020521 - 2¹³ = 45012329 is a prime.

It is a super-2 number, since 2×45020521² = 4053694622222882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45020551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247275 + ... + 247456.

It is an arithmetic number, because the mean of its divisors is an integer number (6926248).

Almost surely, 2^45020521 is an apocalyptic number.

It is an amenable number.

45020521 is a deficient number, since it is larger than the sum of its proper divisors (10389463).

45020521 is a wasteful number, since it uses less digits than its factorization.

45020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494751.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 45020521 is about 6709.7333031947. The cubic root of 45020521 is about 355.7433896454.

Adding to 45020521 its reverse (12502054), we get a palindrome (57522575).

The spelling of 45020521 in words is "forty-five million, twenty thousand, five hundred twenty-one".