4001131 has 4 divisors (see below), whose sum is σ = 4014472. Its totient is φ = 3987792.

The previous prime is 4001119. The next prime is 4001141. The reversal of 4001131 is 1311004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4001131 - 2⁷ = 4001003 is a prime.

It is a super-2 number, since 2×4001131² = 32018098558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001111) 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 3 ways as a sum of consecutive naturals, for example, 6210 + ... + 6823.

It is an arithmetic number, because the mean of its divisors is an integer number (1003618).

Almost surely, 2^4001131 is an apocalyptic number.

4001131 is a deficient number, since it is larger than the sum of its proper divisors (13341).

4001131 is a wasteful number, since it uses less digits than its factorization.

4001131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13340.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 4001131 is about 2000.2827300159. The cubic root of 4001131 is about 158.7550650419.

Adding to 4001131 its reverse (1311004), we get a palindrome (5312135).

The spelling of 4001131 in words is "four million, one thousand, one hundred thirty-one".