5281281 has 20 divisors (see below), whose sum is σ = 7972932. Its totient is φ = 3483648.

The previous prime is 5281273. The next prime is 5281337. The reversal of 5281281 is 1821825.

It can be written as a sum of positive squares in 2 ways, for example, as 2772225 + 2509056 = 1665^2 + 1584^2 .

It is not a de Polignac number, because 5281281 - 2³ = 5281273 is a prime.

It is a super-2 number, since 2×5281281² = 55783858001922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5281201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8865 + ... + 9441.

Almost surely, 2^5281281 is an apocalyptic number.

It is an amenable number.

5281281 is a deficient number, since it is larger than the sum of its proper divisors (2691651).

5281281 is a wasteful number, since it uses less digits than its factorization.

5281281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 693 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 5281281 is about 2298.1037835572. The cubic root of 5281281 is about 174.1458349308.

The spelling of 5281281 in words is "five million, two hundred eighty-one thousand, two hundred eighty-one".