7283281 has 8 divisors (see below), whose sum is σ = 7497000. Its totient is φ = 7071360.

The previous prime is 7283273. The next prime is 7283291. The reversal of 7283281 is 1823827.

It can be written as a sum of positive squares in 4 ways, for example, as 1113025 + 6170256 = 1055^2 + 2484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7283281 - 2³ = 7283273 is a prime.

It is a super-2 number, since 2×7283281² = 106092364249922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7283231) 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 7 ways as a sum of consecutive naturals, for example, 14055 + ... + 14563.

It is an arithmetic number, because the mean of its divisors is an integer number (937125).

Almost surely, 2^7283281 is an apocalyptic number.

It is an amenable number.

7283281 is a deficient number, since it is larger than the sum of its proper divisors (213719).

7283281 is a wasteful number, since it uses less digits than its factorization.

7283281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899.

The product of its digits is 5376, while the sum is 31.

The square root of 7283281 is about 2698.7554539083. The cubic root of 7283281 is about 193.8395332295.

The spelling of 7283281 in words is "seven million, two hundred eighty-three thousand, two hundred eighty-one".