7287681 has 8 divisors (see below), whose sum is σ = 9736864. Its totient is φ = 4848480.

The previous prime is 7287677. The next prime is 7287691. The reversal of 7287681 is 1867827.

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

It is not a de Polignac number, because 7287681 - 2² = 7287677 is a prime.

It is a super-2 number, since 2×7287681² = 106220588715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7287601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580 + ... + 3861.

It is an arithmetic number, because the mean of its divisors is an integer number (1217108).

Almost surely, 2^7287681 is an apocalyptic number.

It is an amenable number.

7287681 is a deficient number, since it is larger than the sum of its proper divisors (2449183).

7287681 is a wasteful number, since it uses less digits than its factorization.

7287681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991.

The product of its digits is 37632, while the sum is 39.

The square root of 7287681 is about 2699.5705213978. The cubic root of 7287681 is about 193.8785597000.

The spelling of 7287681 in words is "seven million, two hundred eighty-seven thousand, six hundred eighty-one".