8403281 has 4 divisors (see below), whose sum is σ = 8409252. Its totient is φ = 8397312.

The previous prime is 8403277. The next prime is 8403289. The reversal of 8403281 is 1823048.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4060225 + 4343056 = 2015^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 8403281 - 2² = 8403277 is a prime.

It is a super-2 number, since 2×8403281² = 141230263129922, 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 8403281.

It is not an unprimeable number, because it can be changed into a prime (8403289) 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, 425 + ... + 4121.

It is an arithmetic number, because the mean of its divisors is an integer number (2102313).

Almost surely, 2^8403281 is an apocalyptic number.

It is an amenable number.

8403281 is a deficient number, since it is larger than the sum of its proper divisors (5971).

8403281 is a wasteful number, since it uses less digits than its factorization.

8403281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 8403281 is about 2898.8413202519. The cubic root of 8403281 is about 203.3057345563.

The spelling of 8403281 in words is "eight million, four hundred three thousand, two hundred eighty-one".