7285281 has 4 divisors (see below), whose sum is σ = 9713712. Its totient is φ = 4856852.

The previous prime is 7285277. The next prime is 7285283. The reversal of 7285281 is 1825827.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1825827 = 3 ⋅608609.

It is a cyclic number.

It is not a de Polignac number, because 7285281 - 2² = 7285277 is a prime.

It is a super-2 number, since 2×7285281² = 106150638497922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7285283) 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, 1214211 + ... + 1214216.

It is an arithmetic number, because the mean of its divisors is an integer number (2428428).

Almost surely, 2^7285281 is an apocalyptic number.

It is an amenable number.

7285281 is a deficient number, since it is larger than the sum of its proper divisors (2428431).

7285281 is a wasteful number, since it uses less digits than its factorization.

7285281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428430.

The product of its digits is 8960, while the sum is 33.

The square root of 7285281 is about 2699.1259696428. The cubic root of 7285281 is about 193.8572744822.

The spelling of 7285281 in words is "seven million, two hundred eighty-five thousand, two hundred eighty-one".