4031091 has 12 divisors (see below), whose sum is σ = 6165432. Its totient is φ = 2529216.

The previous prime is 4031089. The next prime is 4031101. The reversal of 4031091 is 1901304.

It is not a de Polignac number, because 4031091 - 2¹ = 4031089 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4031081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13021 + ... + 13326.

It is an arithmetic number, because the mean of its divisors is an integer number (513786).

Almost surely, 2^4031091 is an apocalyptic number.

4031091 is a deficient number, since it is larger than the sum of its proper divisors (2134341).

4031091 is a wasteful number, since it uses less digits than its factorization.

4031091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26370 (or 26367 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 4031091 is about 2007.7577045052. The cubic root of 4031091 is about 159.1503265604.

Adding to 4031091 its reverse (1901304), we get a palindrome (5932395).

It can be divided in two parts, 40310 and 91, that added together give a square (40401 = 201²).

The spelling of 4031091 in words is "four million, thirty-one thousand, ninety-one".