785257 has 4 divisors (see below), whose sum is σ = 856656. Its totient is φ = 713860.

The previous prime is 785249. The next prime is 785269. The reversal of 785257 is 752587.

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 not a de Polignac number, because 785257 - 2³ = 785249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (785207) 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, 35683 + ... + 35704.

It is an arithmetic number, because the mean of its divisors is an integer number (214164).

2⁷⁸⁵²⁵⁷ is an apocalyptic number.

It is an amenable number.

785257 is a deficient number, since it is larger than the sum of its proper divisors (71399).

785257 is a wasteful number, since it uses less digits than its factorization.

785257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71398.

The product of its digits is 19600, while the sum is 34.

The square root of 785257 is about 886.1472789554. The cubic root of 785257 is about 92.2579794460.

It can be divided in two parts, 78 and 5257, that added together give a palindrome (5335).

The spelling of 785257 in words is "seven hundred eighty-five thousand, two hundred fifty-seven".