4645521 has 6 divisors (see below), whose sum is σ = 6710210. Its totient is φ = 3097008.

The previous prime is 4645507. The next prime is 4645523. The reversal of 4645521 is 1255464.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 1185921 = 1860^2 + 1089^2 .

It is not a de Polignac number, because 4645521 - 2⁵ = 4645489 is a prime.

It is a super-2 number, since 2×4645521² = 43161730722882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4645523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 258076 + ... + 258093.

Almost surely, 2^4645521 is an apocalyptic number.

It is an amenable number.

4645521 is a deficient number, since it is larger than the sum of its proper divisors (2064689).

4645521 is a wasteful number, since it uses less digits than its factorization.

4645521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516175 (or 516172 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 4645521 is about 2155.3470718193. The cubic root of 4645521 is about 166.8571453354.

The spelling of 4645521 in words is "four million, six hundred forty-five thousand, five hundred twenty-one".