5644521 has 6 divisors (see below), whose sum is σ = 8153210. Its totient is φ = 3763008.

The previous prime is 5644517. The next prime is 5644523. The reversal of 5644521 is 1254465.

It can be written as a sum of positive squares in only one way, i.e., 5475600 + 168921 = 2340^2 + 411^2 .

It is not a de Polignac number, because 5644521 - 2² = 5644517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5644523) 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, 313576 + ... + 313593.

Almost surely, 2^5644521 is an apocalyptic number.

It is an amenable number.

5644521 is a deficient number, since it is larger than the sum of its proper divisors (2508689).

5644521 is a wasteful number, since it uses less digits than its factorization.

5644521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627175 (or 627172 counting only the distinct ones).

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

The square root of 5644521 is about 2375.8200689446. The cubic root of 5644521 is about 178.0501584017.

Adding to 5644521 its reverse (1254465), we get a palindrome (6898986).

It can be divided in two parts, 564452 and 1, that added together give a triangular number (564453 = T₁₀₆₂).

The spelling of 5644521 in words is "five million, six hundred forty-four thousand, five hundred twenty-one".