828281 has 4 divisors (see below), whose sum is σ = 845952. Its totient is φ = 810612.

The previous prime is 828277. The next prime is 828349. The reversal of 828281 is 182828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 828281 - 2² = 828277 is a prime.

It is a super-2 number, since 2×828281² = 1372098829922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (828221) 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, 8765 + ... + 8858.

It is an arithmetic number, because the mean of its divisors is an integer number (211488).

2⁸²⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

828281 is a deficient number, since it is larger than the sum of its proper divisors (17671).

828281 is a wasteful number, since it uses less digits than its factorization.

828281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17670.

The product of its digits is 2048, while the sum is 29.

The square root of 828281 is about 910.0994451158. The cubic root of 828281 is about 93.9130401452.

The spelling of 828281 in words is "eight hundred twenty-eight thousand, two hundred eighty-one".