3645625 has 20 divisors (see below), whose sum is σ = 4810960. Its totient is φ = 2754000.

The previous prime is 3645623. The next prime is 3645643. The reversal of 3645625 is 5265463.

It is not a de Polignac number, because 3645625 - 2¹ = 3645623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3645623) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11722 + ... + 12028.

It is an arithmetic number, because the mean of its divisors is an integer number (240548).

Almost surely, 2^3645625 is an apocalyptic number.

It is an amenable number.

3645625 is a deficient number, since it is larger than the sum of its proper divisors (1165335).

3645625 is an equidigital number, since it uses as much as digits as its factorization.

3645625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 331 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 3645625 is about 1909.3519843130. The cubic root of 3645625 is about 153.9066308708.

Adding to 3645625 its product of digits (21600), we get a square (3667225 = 1915²).

It can be divided in two parts, 36456 and 25, that added together give a square (36481 = 191²).

The spelling of 3645625 in words is "three million, six hundred forty-five thousand, six hundred twenty-five".