4085257 has 4 divisors (see below), whose sum is σ = 4456656. Its totient is φ = 3713860.

The previous prime is 4085243. The next prime is 4085261. The reversal of 4085257 is 7525804.

4085257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-4085257 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4085267) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 185683 + ... + 185704.

It is an arithmetic number, because the mean of its divisors is an integer number (1114164).

Almost surely, 2^4085257 is an apocalyptic number.

It is an amenable number.

4085257 is a deficient number, since it is larger than the sum of its proper divisors (371399).

4085257 is a wasteful number, since it uses less digits than its factorization.

4085257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371398.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 4085257 is about 2021.2018701753. The cubic root of 4085257 is about 159.8599947140.

It can be divided in two parts, 408 and 5257, that added together give a palindrome (5665).

The spelling of 4085257 in words is "four million, eighty-five thousand, two hundred fifty-seven".