862439 has 4 divisors (see below), whose sum is σ = 871080. Its totient is φ = 853800.

The previous prime is 862423. The next prime is 862441. The reversal of 862439 is 934268.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 862439 - 2⁴ = 862423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862409) 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, 4169 + ... + 4370.

It is an arithmetic number, because the mean of its divisors is an integer number (217770).

2⁸⁶²⁴³⁹ is an apocalyptic number.

862439 is a deficient number, since it is larger than the sum of its proper divisors (8641).

862439 is a wasteful number, since it uses less digits than its factorization.

862439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8640.

The product of its digits is 10368, while the sum is 32.

The square root of 862439 is about 928.6759391736. The cubic root of 862439 is about 95.1866689781.

The spelling of 862439 in words is "eight hundred sixty-two thousand, four hundred thirty-nine".