12205807 has 4 divisors (see below), whose sum is σ = 12221496. Its totient is φ = 12190120.

The previous prime is 12205799. The next prime is 12205829. The reversal of 12205807 is 70850221.

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

It is a cyclic number.

It is not a de Polignac number, because 12205807 - 2³ = 12205799 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 (12205867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6613 + ... + 8254.

It is an arithmetic number, because the mean of its divisors is an integer number (3055374).

Almost surely, 2^12205807 is an apocalyptic number.

12205807 is a deficient number, since it is larger than the sum of its proper divisors (15689).

12205807 is an equidigital number, since it uses as much as digits as its factorization.

12205807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15688.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 12205807 is about 3493.6810100523. The cubic root of 12205807 is about 230.2442710414.

The spelling of 12205807 in words is "twelve million, two hundred five thousand, eight hundred seven".