4063681 has 4 divisors (see below), whose sum is σ = 4115200. Its totient is φ = 4012164.

The previous prime is 4063643. The next prime is 4063693. The reversal of 4063681 is 1863604.

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 a cyclic number.

It is not a de Polignac number, because 4063681 - 2¹¹ = 4061633 is a prime.

It is a super-2 number, since 2×4063681² = 33027006539522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4063601) 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, 25641 + ... + 25798.

It is an arithmetic number, because the mean of its divisors is an integer number (1028800).

Almost surely, 2^4063681 is an apocalyptic number.

It is an amenable number.

4063681 is a deficient number, since it is larger than the sum of its proper divisors (51519).

4063681 is an equidigital number, since it uses as much as digits as its factorization.

4063681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51518.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4063681 is about 2015.8573858287. The cubic root of 4063681 is about 159.5780679992.

Subtracting from 4063681 its product of nonzero digits (3456), we obtain a square (4060225 = 2015²).

The spelling of 4063681 in words is "four million, sixty-three thousand, six hundred eighty-one".