4023181 has 2 divisors, whose sum is σ = 4023182. Its totient is φ = 4023180.

The previous prime is 4023179. The next prime is 4023191. The reversal of 4023181 is 1813204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2920681 + 1102500 = 1709^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023181 - 2¹ = 4023179 is a prime.

It is a super-2 number, since 2×4023181² = 32371970717522, which contains 22 as substring.

Together with 4023179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4023161) 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 as a sum of consecutive naturals, namely, 2011590 + 2011591.

It is an arithmetic number, because the mean of its divisors is an integer number (2011591).

Almost surely, 2^4023181 is an apocalyptic number.

It is an amenable number.

4023181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4023181 is an equidigital number, since it uses as much as digits as its factorization.

4023181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 4023181 is about 2005.7868780107. The cubic root of 4023181 is about 159.0461609311.

Adding to 4023181 its reverse (1813204), we get a palindrome (5836385).

The spelling of 4023181 in words is "four million, twenty-three thousand, one hundred eighty-one".