7285681 has 4 divisors (see below), whose sum is σ = 7846132. Its totient is φ = 6725232.

The previous prime is 7285679. The next prime is 7285697. The reversal of 7285681 is 1865827.

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 2624400 + 4661281 = 1620^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 7285681 - 2¹ = 7285679 is a prime.

It is a super-2 number, since 2×7285681² = 106162295267522, 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 7285681.

It is not an unprimeable number, because it can be changed into a prime (7285601) 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, 280206 + ... + 280231.

It is an arithmetic number, because the mean of its divisors is an integer number (1961533).

Almost surely, 2^7285681 is an apocalyptic number.

It is an amenable number.

7285681 is a deficient number, since it is larger than the sum of its proper divisors (560451).

7285681 is a wasteful number, since it uses less digits than its factorization.

7285681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560450.

The product of its digits is 26880, while the sum is 37.

The square root of 7285681 is about 2699.2000666864. The cubic root of 7285681 is about 193.8608223431.

The spelling of 7285681 in words is "seven million, two hundred eighty-five thousand, six hundred eighty-one".