1028281 has 4 divisors (see below), whose sum is σ = 1038564. Its totient is φ = 1018000.

The previous prime is 1028273. The next prime is 1028303. The reversal of 1028281 is 1828201.

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 839056 + 189225 = 916^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028281 - 2³ = 1028273 is a prime.

It is a super-2 number, since 2×1028281² = 2114723629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4990 + ... + 5191.

It is an arithmetic number, because the mean of its divisors is an integer number (259641).

2^1028281 is an apocalyptic number.

It is an amenable number.

1028281 is a deficient number, since it is larger than the sum of its proper divisors (10283).

1028281 is a wasteful number, since it uses less digits than its factorization.

1028281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10282.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1028281 is about 1014.0419123488. The cubic root of 1028281 is about 100.9339502150.

The spelling of 1028281 in words is "one million, twenty-eight thousand, two hundred eighty-one".