802157 has 4 divisors (see below), whose sum is σ = 811260. Its totient is φ = 793056.

The previous prime is 802147. The next prime is 802159. The reversal of 802157 is 751208.

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 256036 + 546121 = 506^2 + 739^2 .

It is a cyclic number.

It is not a de Polignac number, because 802157 - 2⁴ = 802141 is a prime.

It is an Ulam number.

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 802157.

It is not an unprimeable number, because it can be changed into a prime (802159) 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, 4418 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (202815).

2⁸⁰²¹⁵⁷ is an apocalyptic number.

It is an amenable number.

802157 is a deficient number, since it is larger than the sum of its proper divisors (9103).

802157 is an equidigital number, since it uses as much as digits as its factorization.

802157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9102.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 802157 is about 895.6321789663. The cubic root of 802157 is about 92.9151343586.

It can be divided in two parts, 802 and 157, that added together give a palindrome (959).

The spelling of 802157 in words is "eight hundred two thousand, one hundred fifty-seven".