5640625 has 21 divisors (see below), whose sum is σ = 7441311. Its totient is φ = 4275000.

The previous prime is 5640623. The next prime is 5640629. The reversal of 5640625 is 5260465.

The square root of 5640625 is 2375.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 4941729 + 698896 = 2223^2 + 836^2 .

It is not a de Polignac number, because 5640625 - 2¹ = 5640623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5640593 and 5640602.

It is not an unprimeable number, because it can be changed into a prime (5640623) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 296866 + ... + 296884.

Almost surely, 2^5640625 is an apocalyptic number.

5640625 is the 2375-th square number.

5640625 is the 1188-th centered octagonal number.

It is an amenable number.

5640625 is a deficient number, since it is larger than the sum of its proper divisors (1800686).

5640625 is an frugal number, since it uses more digits than its factorization.

5640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 24 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The cubic root of 5640625 is about 178.0091839725.

The spelling of 5640625 in words is "five million, six hundred forty thousand, six hundred twenty-five".