862139 has 2 divisors, whose sum is σ = 862140. Its totient is φ = 862138.

The previous prime is 862129. The next prime is 862157. The reversal of 862139 is 931268.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 862139 - 2⁴ = 862123 is a prime.

It is not a weakly prime, because it can be changed into another prime (862129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431069 + 431070.

It is an arithmetic number, because the mean of its divisors is an integer number (431070).

2⁸⁶²¹³⁹ is an apocalyptic number.

862139 is a deficient number, since it is larger than the sum of its proper divisors (1).

862139 is an equidigital number, since it uses as much as digits as its factorization.

862139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 862139 is about 928.5144048425. The cubic root of 862139 is about 95.1756307820.

It can be divided in two parts, 862 and 139, that added together give a palindrome (1001).

The spelling of 862139 in words is "eight hundred sixty-two thousand, one hundred thirty-nine".