4100805 has 12 divisors (see below), whose sum is σ = 7108140. Its totient is φ = 2187072.

The previous prime is 4100777. The next prime is 4100807. The reversal of 4100805 is 5080014.

It can be written as a sum of positive squares in 2 ways, for example, as 1695204 + 2405601 = 1302^2 + 1551^2 .

It is not a de Polignac number, because 4100805 - 2⁶ = 4100741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4100807) 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, 45520 + ... + 45609.

It is an arithmetic number, because the mean of its divisors is an integer number (592345).

Almost surely, 2^4100805 is an apocalyptic number.

4100805 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4100805 is a deficient number, since it is larger than the sum of its proper divisors (3007335).

4100805 is a wasteful number, since it uses less digits than its factorization.

4100805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91140 (or 91137 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 4100805 is about 2025.0444439567. The cubic root of 4100805 is about 160.0625406551.

Adding to 4100805 its reverse (5080014), we get a palindrome (9180819).

The spelling of 4100805 in words is "four million, one hundred thousand, eight hundred five".