3944245 has 4 divisors (see below), whose sum is σ = 4733100. Its totient is φ = 3155392.

The previous prime is 3944231. The next prime is 3944249. The reversal of 3944245 is 5424493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5424493 = 43 ⋅126151.

It can be written as a sum of positive squares in 2 ways, for example, as 1406596 + 2537649 = 1186^2 + 1593^2 .

It is a cyclic number.

It is not a de Polignac number, because 3944245 - 2¹⁹ = 3419957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944249) 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 3 ways as a sum of consecutive naturals, for example, 394420 + ... + 394429.

It is an arithmetic number, because the mean of its divisors is an integer number (1183275).

Almost surely, 2^3944245 is an apocalyptic number.

It is an amenable number.

3944245 is a deficient number, since it is larger than the sum of its proper divisors (788855).

3944245 is an equidigital number, since it uses as much as digits as its factorization.

3944245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788854.

The product of its digits is 17280, while the sum is 31.

The square root of 3944245 is about 1986.0123363162. The cubic root of 3944245 is about 157.9991053733. Note that the first 3 decimals are identical.

The spelling of 3944245 in words is "three million, nine hundred forty-four thousand, two hundred forty-five".