3939257 has 12 divisors (see below), whose sum is σ = 4852980. Its totient is φ = 3177216.

The previous prime is 3939241. The next prime is 3939259. The reversal of 3939257 is 7529393.

It can be written as a sum of positive squares in 2 ways, for example, as 1301881 + 2637376 = 1141^2 + 1624^2 .

It is not a de Polignac number, because 3939257 - 2⁴ = 3939241 is a prime.

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 3939257.

It is not an unprimeable number, because it can be changed into a prime (3939259) 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 11 ways as a sum of consecutive naturals, for example, 1532 + ... + 3197.

It is an arithmetic number, because the mean of its divisors is an integer number (404415).

Almost surely, 2^3939257 is an apocalyptic number.

It is an amenable number.

3939257 is a deficient number, since it is larger than the sum of its proper divisors (913723).

3939257 is a wasteful number, since it uses less digits than its factorization.

3939257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760 (or 4753 counting only the distinct ones).

The product of its digits is 51030, while the sum is 38.

The square root of 3939257 is about 1984.7561563074. The cubic root of 3939257 is about 157.9324739489.

The spelling of 3939257 in words is "three million, nine hundred thirty-nine thousand, two hundred fifty-seven".