7005681 has 6 divisors (see below), whose sum is σ = 10119330. Its totient is φ = 4670448.

The previous prime is 7005673. The next prime is 7005697. The reversal of 7005681 is 1865007.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 349281 = 2580^2 + 591^2 .

It is not a de Polignac number, because 7005681 - 2³ = 7005673 is a prime.

It is a super-2 number, since 2×7005681² = 98159132547522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7005181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 389196 + ... + 389213.

It is an arithmetic number, because the mean of its divisors is an integer number (1686555).

Almost surely, 2^7005681 is an apocalyptic number.

It is an amenable number.

7005681 is a deficient number, since it is larger than the sum of its proper divisors (3113649).

7005681 is a wasteful number, since it uses less digits than its factorization.

7005681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778415 (or 778412 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 7005681 is about 2646.8247014111. The cubic root of 7005681 is about 191.3448536272.

It can be divided in two parts, 700568 and 1, that added together give a square (700569 = 837²).

The spelling of 7005681 in words is "seven million, five thousand, six hundred eighty-one".