3981225 has 24 divisors (see below), whose sum is σ = 6656320. Its totient is φ = 2099520.

The previous prime is 3981217. The next prime is 3981227. The reversal of 3981225 is 5221893.

It is a happy number.

It is not a de Polignac number, because 3981225 - 2³ = 3981217 is a prime.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 3981192 and 3981201.

It is not an unprimeable number, because it can be changed into a prime (3981227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7932 + ... + 8418.

Almost surely, 2^3981225 is an apocalyptic number.

It is an amenable number.

3981225 is a deficient number, since it is larger than the sum of its proper divisors (2675095).

3981225 is a wasteful number, since it uses less digits than its factorization.

3981225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 604 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 3981225 is about 1995.3007292135. The cubic root of 3981225 is about 158.4913534742.

The spelling of 3981225 in words is "three million, nine hundred eighty-one thousand, two hundred twenty-five".