863251 has 2 divisors, whose sum is σ = 863252. Its totient is φ = 863250.

The previous prime is 863231. The next prime is 863279. The reversal of 863251 is 152368.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863251 - 2⁷ = 863123 is a prime.

It is not a weakly prime, because it can be changed into another prime (863231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431625 + 431626.

It is an arithmetic number, because the mean of its divisors is an integer number (431626).

2⁸⁶³²⁵¹ is an apocalyptic number.

863251 is a deficient number, since it is larger than the sum of its proper divisors (1).

863251 is an equidigital number, since it uses as much as digits as its factorization.

863251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 863251 is about 929.1130178832. The cubic root of 863251 is about 95.2165328606.

The spelling of 863251 in words is "eight hundred sixty-three thousand, two hundred fifty-one".