12205919 has 4 divisors (see below), whose sum is σ = 13315560. Its totient is φ = 11096280.

The previous prime is 12205903. The next prime is 12205933. The reversal of 12205919 is 91950221.

12205919 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12205919 - 2⁴ = 12205903 is a prime.

It is a super-2 number, since 2×12205919² = 297968917269122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12205891 and 12205900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202919) 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, 554804 + ... + 554825.

It is an arithmetic number, because the mean of its divisors is an integer number (3328890).

Almost surely, 2^12205919 is an apocalyptic number.

12205919 is a deficient number, since it is larger than the sum of its proper divisors (1109641).

12205919 is a wasteful number, since it uses less digits than its factorization.

12205919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109640.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 12205919 is about 3493.6970389546. The cubic root of 12205919 is about 230.2449752767.

The spelling of 12205919 in words is "twelve million, two hundred five thousand, nine hundred nineteen".