3857257 has 4 divisors (see below), whose sum is σ = 3914896. Its totient is φ = 3799620.

The previous prime is 3857233. The next prime is 3857263. The reversal of 3857257 is 7527583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3857257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3857207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28719 + ... + 28852.

It is an arithmetic number, because the mean of its divisors is an integer number (978724).

Almost surely, 2^3857257 is an apocalyptic number.

It is an amenable number.

3857257 is a deficient number, since it is larger than the sum of its proper divisors (57639).

3857257 is an equidigital number, since it uses as much as digits as its factorization.

3857257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57638.

The product of its digits is 58800, while the sum is 37.

The square root of 3857257 is about 1963.9900712580. The cubic root of 3857257 is about 156.8289345335.

It can be divided in two parts, 3857 and 257, that added together give a palindrome (4114).

The spelling of 3857257 in words is "three million, eight hundred fifty-seven thousand, two hundred fifty-seven".