12100805 has 8 divisors (see below), whose sum is σ = 14598144. Its totient is φ = 9629200.

The previous prime is 12100793. The next prime is 12100807. The reversal of 12100805 is 50800121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12100805 - 2⁶ = 12100741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5381 + ... + 7290.

It is an arithmetic number, because the mean of its divisors is an integer number (1824768).

Almost surely, 2^12100805 is an apocalyptic number.

It is an amenable number.

12100805 is a deficient number, since it is larger than the sum of its proper divisors (2497339).

12100805 is a wasteful number, since it uses less digits than its factorization.

12100805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12867.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 12100805 is about 3478.6211348751. The cubic root of 12100805 is about 229.5821335250.

Adding to 12100805 its reverse (50800121), we get a palindrome (62900926).

The spelling of 12100805 in words is "twelve million, one hundred thousand, eight hundred five".