12097805 has 4 divisors (see below), whose sum is σ = 14517372. Its totient is φ = 9678240.

The previous prime is 12097783. The next prime is 12097817. The reversal of 12097805 is 50879021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8185321 + 3912484 = 2861^2 + 1978^2 .

It is not a de Polignac number, because 12097805 - 2¹⁸ = 11835661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1209776 + ... + 1209785.

It is an arithmetic number, because the mean of its divisors is an integer number (3629343).

Almost surely, 2^12097805 is an apocalyptic number.

It is an amenable number.

12097805 is a deficient number, since it is larger than the sum of its proper divisors (2419567).

12097805 is an equidigital number, since it uses as much as digits as its factorization.

12097805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419566.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 12097805 is about 3478.1899028086. The cubic root of 12097805 is about 229.5631594891.

The spelling of 12097805 in words is "twelve million, ninety-seven thousand, eight hundred five".