4122181 has 16 divisors (see below), whose sum is σ = 4935168. Its totient is φ = 3369600.

The previous prime is 4122179. The next prime is 4122187. The reversal of 4122181 is 1812214.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4122181 - 2¹ = 4122179 is a prime.

It is a super-2 number, since 2×4122181² = 33984752393522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4122187) 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 15 ways as a sum of consecutive naturals, for example, 15076 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (308448).

Almost surely, 2^4122181 is an apocalyptic number.

4122181 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4122181 is a deficient number, since it is larger than the sum of its proper divisors (812987).

4122181 is a wasteful number, since it uses less digits than its factorization.

4122181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its digits is 128, while the sum is 19.

The square root of 4122181 is about 2030.3154927252. The cubic root of 4122181 is about 160.3401746823.

Adding to 4122181 its reverse (1812214), we get a palindrome (5934395).

It can be divided in two parts, 41 and 22181, that added together give a palindrome (22222).

The spelling of 4122181 in words is "four million, one hundred twenty-two thousand, one hundred eighty-one".