3856257 has 6 divisors (see below), whose sum is σ = 5570162. Its totient is φ = 2570832.

The previous prime is 3856253. The next prime is 3856261. The reversal of 3856257 is 7526583.

It is an interprime number because it is at equal distance from previous prime (3856253) and next prime (3856261).

It can be written as a sum of positive squares in only one way, i.e., 3538161 + 318096 = 1881^2 + 564^2 .

It is not a de Polignac number, because 3856257 - 2² = 3856253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3856253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214228 + ... + 214245.

Almost surely, 2^3856257 is an apocalyptic number.

It is an amenable number.

3856257 is a deficient number, since it is larger than the sum of its proper divisors (1713905).

3856257 is a wasteful number, since it uses less digits than its factorization.

3856257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428479 (or 428476 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 3856257 is about 1963.7354709838. The cubic root of 3856257 is about 156.8153806454.

The spelling of 3856257 in words is "three million, eight hundred fifty-six thousand, two hundred fifty-seven".