3945225 has 24 divisors (see below), whose sum is σ = 6687072. Its totient is φ = 2051200.

The previous prime is 3945203. The next prime is 3945233. The reversal of 3945225 is 5225493.

It is not a de Polignac number, because 3945225 - 2¹⁵ = 3912457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3945192 and 3945201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2434 + ... + 3716.

It is an arithmetic number, because the mean of its divisors is an integer number (278628).

Almost surely, 2^3945225 is an apocalyptic number.

It is an amenable number.

3945225 is a deficient number, since it is larger than the sum of its proper divisors (2741847).

3945225 is a wasteful number, since it uses less digits than its factorization.

3945225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337 (or 1332 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 3945225 is about 1986.2590465496. The cubic root of 3945225 is about 158.0121899477.

The spelling of 3945225 in words is "three million, nine hundred forty-five thousand, two hundred twenty-five".