3915225 has 18 divisors (see below), whose sum is σ = 7013006. Its totient is φ = 2088000.

The previous prime is 3915187. The next prime is 3915239. The reversal of 3915225 is 5225193.

It can be written as a sum of positive squares in 3 ways, for example, as 331776 + 3583449 = 576^2 + 1893^2 .

It is not a de Polignac number, because 3915225 - 2¹⁰ = 3914201 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8476 + ... + 8925.

Almost surely, 2^3915225 is an apocalyptic number.

It is an amenable number.

3915225 is a deficient number, since it is larger than the sum of its proper divisors (3097781).

3915225 is a wasteful number, since it uses less digits than its factorization.

3915225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17417 (or 17409 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 3915225 is about 1978.6927502773. The cubic root of 3915225 is about 157.6106554203.

The spelling of 3915225 in words is "three million, nine hundred fifteen thousand, two hundred twenty-five".