851157 has 6 divisors (see below), whose sum is σ = 1229462. Its totient is φ = 567432.

The previous prime is 851153. The next prime is 851159. The reversal of 851157 is 751158.

It can be written as a sum of positive squares in only one way, i.e., 848241 + 2916 = 921^2 + 54^2 .

It is not a de Polignac number, because 851157 - 2² = 851153 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 851157.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851157.

It is not an unprimeable number, because it can be changed into a prime (851153) 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 5 ways as a sum of consecutive naturals, for example, 47278 + ... + 47295.

2⁸⁵¹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

851157 is a deficient number, since it is larger than the sum of its proper divisors (378305).

851157 is a wasteful number, since it uses less digits than its factorization.

851157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94579 (or 94576 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 851157 is about 922.5817036989. The cubic root of 851157 is about 94.7697842067.

Subtracting from 851157 its reverse (751158), we obtain a palindrome (99999).

The spelling of 851157 in words is "eight hundred fifty-one thousand, one hundred fifty-seven".