802257 has 4 divisors (see below), whose sum is σ = 1069680. Its totient is φ = 534836.

The previous prime is 802253. The next prime is 802279. The reversal of 802257 is 752208.

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 802257 - 2² = 802253 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (802253) 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, 133707 + ... + 133712.

It is an arithmetic number, because the mean of its divisors is an integer number (267420).

2⁸⁰²²⁵⁷ is an apocalyptic number.

It is an amenable number.

802257 is a deficient number, since it is larger than the sum of its proper divisors (267423).

802257 is a wasteful number, since it uses less digits than its factorization.

802257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267422.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 802257 is about 895.6880037156. The cubic root of 802257 is about 92.9189952518.

The spelling of 802257 in words is "eight hundred two thousand, two hundred fifty-seven".