5071681 has 4 divisors (see below), whose sum is σ = 5085652. Its totient is φ = 5057712.

The previous prime is 5071679. The next prime is 5071687. The reversal of 5071681 is 1861705.

It is a happy number.

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 1461681 + 3610000 = 1209^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 5071681 - 2¹ = 5071679 is a prime.

It is a super-2 number, since 2×5071681² = 51443896331522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5071687) 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, 6426 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (1271413).

Almost surely, 2^5071681 is an apocalyptic number.

It is an amenable number.

5071681 is a deficient number, since it is larger than the sum of its proper divisors (13971).

5071681 is a wasteful number, since it uses less digits than its factorization.

5071681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13970.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 5071681 is about 2252.0392980585. The cubic root of 5071681 is about 171.8108724292.

The spelling of 5071681 in words is "five million, seventy-one thousand, six hundred eighty-one".