3663925 has 24 divisors (see below), whose sum is σ = 4961736. Its totient is φ = 2672640.

The previous prime is 3663917. The next prime is 3663929. The reversal of 3663925 is 5293663.

3663925 = 1353² + 1354².

It can be written as a sum of positive squares in 12 ways, for example, as 358801 + 3305124 = 599^2 + 1818^2 .

It is not a de Polignac number, because 3663925 - 2³ = 3663917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15609 + ... + 15841.

It is an arithmetic number, because the mean of its divisors is an integer number (206739).

Almost surely, 2^3663925 is an apocalyptic number.

3663925 is the 1354-th centered square number.

It is an amenable number.

3663925 is a deficient number, since it is larger than the sum of its proper divisors (1297811).

3663925 is a wasteful number, since it uses less digits than its factorization.

3663925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 292 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

The square root of 3663925 is about 1914.1381872791. The cubic root of 3663925 is about 154.1637236675.

The spelling of 3663925 in words is "three million, six hundred sixty-three thousand, nine hundred twenty-five".