865157 has 4 divisors (see below), whose sum is σ = 895020. Its totient is φ = 835296.

The previous prime is 865153. The next prime is 865159. The reversal of 865157 is 751568.

865157 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.

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 454276 = 641^2 + 674^2 .

It is a cyclic number.

It is not a de Polignac number, because 865157 - 2² = 865153 is a prime.

It is a Duffinian number.

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 865157.

It is not an unprimeable number, because it can be changed into a prime (865153) 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, 14888 + ... + 14945.

It is an arithmetic number, because the mean of its divisors is an integer number (223755).

2⁸⁶⁵¹⁵⁷ is an apocalyptic number.

It is an amenable number.

865157 is a deficient number, since it is larger than the sum of its proper divisors (29863).

865157 is a wasteful number, since it uses less digits than its factorization.

865157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29862.

The product of its digits is 8400, while the sum is 32.

The square root of 865157 is about 930.1381617803. The cubic root of 865157 is about 95.2865585766.

The spelling of 865157 in words is "eight hundred sixty-five thousand, one hundred fifty-seven".