4181805 has 48 divisors (see below), whose sum is σ = 7849920. Its totient is φ = 2052864.

The previous prime is 4181797. The next prime is 4181819. The reversal of 4181805 is 5081814.

It is not a de Polignac number, because 4181805 - 2³ = 4181797 is a prime.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57249 + ... + 57321.

It is an arithmetic number, because the mean of its divisors is an integer number (163540).

Almost surely, 2^4181805 is an apocalyptic number.

4181805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4181805 is a deficient number, since it is larger than the sum of its proper divisors (3668115).

4181805 is a wasteful number, since it uses less digits than its factorization.

4181805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 4181805 is about 2044.9462095615. The cubic root of 4181805 is about 161.1095405669.

Subtracting 4181805 from its reverse (5081814), we obtain a palindrome (900009).

The spelling of 4181805 in words is "four million, one hundred eighty-one thousand, eight hundred five".