3909225 has 24 divisors (see below), whose sum is σ = 6606720. Its totient is φ = 2038720.

The previous prime is 3909221. The next prime is 3909233. The reversal of 3909225 is 5229093.

It is not a de Polignac number, because 3909225 - 2² = 3909221 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

3909225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3909192 and 3909201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3909221) 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, 2971 + ... + 4079.

It is an arithmetic number, because the mean of its divisors is an integer number (275280).

Almost surely, 2^3909225 is an apocalyptic number.

It is an amenable number.

3909225 is a deficient number, since it is larger than the sum of its proper divisors (2697495).

3909225 is a wasteful number, since it uses less digits than its factorization.

3909225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 3909225 is about 1977.1760164437. The cubic root of 3909225 is about 157.5301025858.

The spelling of 3909225 in words is "three million, nine hundred nine thousand, two hundred twenty-five".