4000481 has 6 divisors (see below), whose sum is σ = 4058082. Its totient is φ = 3943680.

The previous prime is 4000439. The next prime is 4000489. The reversal of 4000481 is 1840004.

It is a happy number.

4000481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 99856 = 1975^2 + 316^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4000481 is a prime.

It is a super-2 number, since 2×4000481² = 32007696462722, which contains 22 as substring.

It is a Duffinian number.

4000481 is a modest number, since divided by 481 gives 4 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4000489) 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 5 ways as a sum of consecutive naturals, for example, 5921 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (676347).

Almost surely, 2^4000481 is an apocalyptic number.

It is an amenable number.

4000481 is a deficient number, since it is larger than the sum of its proper divisors (57601).

4000481 is an frugal number, since it uses more digits than its factorization.

4000481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4000481 is about 2000.1202463852. The cubic root of 4000481 is about 158.7464677743.

Adding to 4000481 its reverse (1840004), we get a palindrome (5840485).

The spelling of 4000481 in words is "four million, four hundred eighty-one", and thus it is an aban number.