4073681 has 4 divisors (see below), whose sum is σ = 4091700. Its totient is φ = 4055664.

The previous prime is 4073677. The next prime is 4073683. The reversal of 4073681 is 1863704.

4073681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3900625 + 173056 = 1975^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 4073681 - 2² = 4073677 is a prime.

It is a super-2 number, since 2×4073681² = 33189753779522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (4073683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8666 + ... + 9123.

It is an arithmetic number, because the mean of its divisors is an integer number (1022925).

Almost surely, 2^4073681 is an apocalyptic number.

It is an amenable number.

4073681 is a deficient number, since it is larger than the sum of its proper divisors (18019).

4073681 is a wasteful number, since it uses less digits than its factorization.

4073681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18018.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 4073681 is about 2018.3361959793. The cubic root of 4073681 is about 159.7088585713.

The spelling of 4073681 in words is "four million, seventy-three thousand, six hundred eighty-one".