4071681 has 16 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 2571264.

The previous prime is 4071679. The next prime is 4071701. The reversal of 4071681 is 1861704.

It is a happy number.

It is not a de Polignac number, because 4071681 - 2¹ = 4071679 is a prime.

It is a super-2 number, since 2×4071681² = 33157172331522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (4071601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3456 + ... + 4481.

It is an arithmetic number, because the mean of its divisors is an integer number (396900).

Almost surely, 2^4071681 is an apocalyptic number.

It is an amenable number.

4071681 is a deficient number, since it is larger than the sum of its proper divisors (2278719).

4071681 is a wasteful number, since it uses less digits than its factorization.

4071681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7965 (or 7959 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 4071681 is about 2017.8406775561. The cubic root of 4071681 is about 159.6827175943.

The spelling of 4071681 in words is "four million, seventy-one thousand, six hundred eighty-one".