4002111 has 12 divisors (see below), whose sum is σ = 5867992. Its totient is φ = 2627856.

The previous prime is 4002109. The next prime is 4002113. The reversal of 4002111 is 1112004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4002109) and next prime (4002113).

It is not a de Polignac number, because 4002111 - 2¹ = 4002109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

4002111 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4002093 and 4002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2716 + ... + 3921.

Almost surely, 2^4002111 is an apocalyptic number.

4002111 is a deficient number, since it is larger than the sum of its proper divisors (1865881).

4002111 is a wasteful number, since it uses less digits than its factorization.

4002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6710 (or 6707 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 4002111 is about 2000.5276803884. The cubic root of 4002111 is about 158.7680253160.

Adding to 4002111 its reverse (1112004), we get a palindrome (5114115).

The spelling of 4002111 in words is "four million, two thousand, one hundred eleven".