869257 has 2 divisors, whose sum is σ = 869258. Its totient is φ = 869256.

The previous prime is 869251. The next prime is 869273. The reversal of 869257 is 752968.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 203401 = 816^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 869257 - 2³ = 869249 is a prime.

It is not a weakly prime, because it can be changed into another prime (869251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434628 + 434629.

It is an arithmetic number, because the mean of its divisors is an integer number (434629).

2⁸⁶⁹²⁵⁷ is an apocalyptic number.

It is an amenable number.

869257 is a deficient number, since it is larger than the sum of its proper divisors (1).

869257 is an equidigital number, since it uses as much as digits as its factorization.

869257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 869257 is about 932.3395304287. The cubic root of 869257 is about 95.4368431957.

The spelling of 869257 in words is "eight hundred sixty-nine thousand, two hundred fifty-seven".