782081 has 4 divisors (see below), whose sum is σ = 794964. Its totient is φ = 769200.

The previous prime is 782071. The next prime is 782083. The reversal of 782081 is 180287.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 748225 = 184^2 + 865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-782081 is a prime.

It is a super-2 number, since 2×782081² = 1223301381122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 782081.

It is not an unprimeable number, because it can be changed into a prime (782083) 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, 6350 + ... + 6471.

It is an arithmetic number, because the mean of its divisors is an integer number (198741).

2⁷⁸²⁰⁸¹ is an apocalyptic number.

It is an amenable number.

782081 is a deficient number, since it is larger than the sum of its proper divisors (12883).

782081 is a wasteful number, since it uses less digits than its factorization.

782081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12882.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 782081 is about 884.3534361329. The cubic root of 782081 is about 92.1334311498.

The spelling of 782081 in words is "seven hundred eighty-two thousand, eighty-one".