3940225 has 9 divisors (see below), whose sum is σ = 4898217. Its totient is φ = 3144240.

The previous prime is 3940217. The next prime is 3940231. The reversal of 3940225 is 5220493.

It is a happy number.

The square root of 3940225 is 1985.

It is a perfect power (a square), and thus also a powerful number.

3940225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3969 + 3936256 = 63^2 + 1984^2 .

It is not a de Polignac number, because 3940225 - 2³ = 3940217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3940225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9727 + ... + 10123.

Almost surely, 2^3940225 is an apocalyptic number.

3940225 is the 1985-th square number.

3940225 is the 993-rd centered octagonal number.

It is an amenable number.

3940225 is a deficient number, since it is larger than the sum of its proper divisors (957992).

3940225 is an frugal number, since it uses more digits than its factorization.

3940225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The cubic root of 3940225 is about 157.9454092236.

Multiplying 3940225 by its sum of digits (25), we get a square (98505625 = 9925²).

3940225 divided by its sum of digits (25) gives a square (157609 = 397²).

The spelling of 3940225 in words is "three million, nine hundred forty thousand, two hundred twenty-five".