5851681 has 12 divisors (see below), whose sum is σ = 6497316. Its totient is φ = 5265920.

The previous prime is 5851673. The next prime is 5851691. The reversal of 5851681 is 1861585.

It can be written as a sum of positive squares in 2 ways, for example, as 2907025 + 2944656 = 1705^2 + 1716^2 .

It is not a de Polignac number, because 5851681 - 2³ = 5851673 is a prime.

It is a super-2 number, since 2×5851681² = 68484341051522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5851691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16401 + ... + 16753.

It is an arithmetic number, because the mean of its divisors is an integer number (541443).

Almost surely, 2^5851681 is an apocalyptic number.

It is an amenable number.

5851681 is a deficient number, since it is larger than the sum of its proper divisors (645635).

5851681 is a wasteful number, since it uses less digits than its factorization.

5851681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 501 counting only the distinct ones).

The product of its digits is 9600, while the sum is 34.

The square root of 5851681 is about 2419.0248035107. The cubic root of 5851681 is about 180.2022520837.

The spelling of 5851681 in words is "five million, eight hundred fifty-one thousand, six hundred eighty-one".