4090181 has 4 divisors (see below), whose sum is σ = 4099200. Its totient is φ = 4081164.

The previous prime is 4090153. The next prime is 4090193. The reversal of 4090181 is 1810904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4090181 - 2¹⁰ = 4089157 is a prime.

It is a super-2 number, since 2×4090181² = 33459161225522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4093181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3791 + ... + 4748.

It is an arithmetic number, because the mean of its divisors is an integer number (1024800).

Almost surely, 2^4090181 is an apocalyptic number.

It is an amenable number.

4090181 is a deficient number, since it is larger than the sum of its proper divisors (9019).

4090181 is an equidigital number, since it uses as much as digits as its factorization.

4090181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 4090181 is about 2022.4195904906. The cubic root of 4090181 is about 159.9241958623.

The spelling of 4090181 in words is "four million, ninety thousand, one hundred eighty-one".