802439 has 4 divisors (see below), whose sum is σ = 875400. Its totient is φ = 729480.

The previous prime is 802421. The next prime is 802441. The reversal of 802439 is 934208.

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 802439 - 2⁸ = 802183 is a prime.

It is a Duffinian number.

802439 is a modest number, since divided by 2439 gives 8 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 802439.

It is not an unprimeable number, because it can be changed into a prime (802499) 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, 36464 + ... + 36485.

It is an arithmetic number, because the mean of its divisors is an integer number (218850).

2⁸⁰²⁴³⁹ is an apocalyptic number.

802439 is a deficient number, since it is larger than the sum of its proper divisors (72961).

802439 is a wasteful number, since it uses less digits than its factorization.

802439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72960.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 802439 is about 895.7895958315. The cubic root of 802439 is about 92.9260212540.

Subtracting 802439 from its reverse (934208), we obtain a square (131769 = 363²).

The spelling of 802439 in words is "eight hundred two thousand, four hundred thirty-nine".