802381 has 4 divisors (see below), whose sum is σ = 806652. Its totient is φ = 798112.

The previous prime is 802357. The next prime is 802387. The reversal of 802381 is 183208.

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 477481 + 324900 = 691^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 802381 - 2⁷ = 802253 is a prime.

It is a super-2 number, since 2×802381² = 1287630538322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802387) 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, 1840 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (201663).

2⁸⁰²³⁸¹ is an apocalyptic number.

It is an amenable number.

802381 is a deficient number, since it is larger than the sum of its proper divisors (4271).

802381 is a wasteful number, since it uses less digits than its factorization.

802381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 802381 is about 895.7572215729. The cubic root of 802381 is about 92.9237823137.

Adding to 802381 its reverse (183208), we get a palindrome (985589).

The spelling of 802381 in words is "eight hundred two thousand, three hundred eighty-one".