3655625 has 10 divisors (see below), whose sum is σ = 4568850. Its totient is φ = 2924000.

The previous prime is 3655609. The next prime is 3655627. The reversal of 3655625 is 5265563.

It can be written as a sum of positive squares in 5 ways, for example, as 1731856 + 1923769 = 1316^2 + 1387^2 .

It is not a de Polignac number, because 3655625 - 2⁴ = 3655609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3655591 and 3655600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655627) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2300 + ... + 3549.

It is an arithmetic number, because the mean of its divisors is an integer number (456885).

Almost surely, 2^3655625 is an apocalyptic number.

It is an amenable number.

3655625 is a deficient number, since it is larger than the sum of its proper divisors (913225).

3655625 is an frugal number, since it uses more digits than its factorization.

3655625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869 (or 5854 counting only the distinct ones).

The product of its digits is 27000, while the sum is 32.

The square root of 3655625 is about 1911.9688804999. The cubic root of 3655625 is about 154.0472250736.

The spelling of 3655625 in words is "three million, six hundred fifty-five thousand, six hundred twenty-five".