3900225 has 96 divisors (see below), whose sum is σ = 8570880. Its totient is φ = 1520640.

The previous prime is 3900223. The next prime is 3900227. The reversal of 3900225 is 5220093.

3900225 = T₆₂ + T₆₃ + ... + T₂₈₆.

It is an interprime number because it is at equal distance from previous prime (3900223) and next prime (3900227).

It is not a de Polignac number, because 3900225 - 2¹ = 3900223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (3900223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 169564 + ... + 169586.

It is an arithmetic number, because the mean of its divisors is an integer number (89280).

Almost surely, 2^3900225 is an apocalyptic number.

3900225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3900225 is an abundant number, since it is smaller than the sum of its proper divisors (4670655).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3900225 is a wasteful number, since it uses less digits than its factorization.

3900225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3900225 is about 1974.8987315809. The cubic root of 3900225 is about 157.4091186452.

The spelling of 3900225 in words is "three million, nine hundred thousand, two hundred twenty-five".