4012081 has 2 divisors, whose sum is σ = 4012082. Its totient is φ = 4012080.

The previous prime is 4012079. The next prime is 4012103. The reversal of 4012081 is 1802104.

It is a happy number.

4012081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3272481 + 739600 = 1809^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 4012081 - 2¹ = 4012079 is a prime.

It is a super-2 number, since 2×4012081² = 32193587901122, which contains 22 as substring.

Together with 4012079, it forms a pair of twin primes.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4012381) 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 as a sum of consecutive naturals, namely, 2006040 + 2006041.

It is an arithmetic number, because the mean of its divisors is an integer number (2006041).

Almost surely, 2^4012081 is an apocalyptic number.

It is an amenable number.

4012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012081 is an equidigital number, since it uses as much as digits as its factorization.

4012081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 4012081 is about 2003.0179729598. The cubic root of 4012081 is about 158.8997561768.

Adding to 4012081 its reverse (1802104), we get a palindrome (5814185).

It can be divided in two parts, 40 and 12081, that added together give a palindrome (12121).

The spelling of 4012081 in words is "four million, twelve thousand, eighty-one".