7845681 has 4 divisors (see below), whose sum is σ = 10460912. Its totient is φ = 5230452.

The previous prime is 7845671. The next prime is 7845683. The reversal of 7845681 is 1865487.

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.

It is not a de Polignac number, because 7845681 - 2⁹ = 7845169 is a prime.

It is a super-2 number, since 2×7845681² = 123109420707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7845683) 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, 1307611 + ... + 1307616.

It is an arithmetic number, because the mean of its divisors is an integer number (2615228).

Almost surely, 2^7845681 is an apocalyptic number.

It is an amenable number.

7845681 is a deficient number, since it is larger than the sum of its proper divisors (2615231).

7845681 is a wasteful number, since it uses less digits than its factorization.

7845681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615230.

The product of its digits is 53760, while the sum is 39.

The square root of 7845681 is about 2801.0142805777. The cubic root of 7845681 is about 198.7056496904.

The spelling of 7845681 in words is "seven million, eight hundred forty-five thousand, six hundred eighty-one".