12205851 has 24 divisors (see below), whose sum is σ = 19381824. Its totient is φ = 6809040.

The previous prime is 12205849. The next prime is 12205867. The reversal of 12205851 is 15850221.

It is not a de Polignac number, because 12205851 - 2¹ = 12205849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12205891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5356 + ... + 7286.

It is an arithmetic number, because the mean of its divisors is an integer number (807576).

Almost surely, 2^12205851 is an apocalyptic number.

12205851 is a deficient number, since it is larger than the sum of its proper divisors (7175973).

12205851 is a wasteful number, since it uses less digits than its factorization.

12205851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1984 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 12205851 is about 3493.6873071298. The cubic root of 12205851 is about 230.2445477058.

The spelling of 12205851 in words is "twelve million, two hundred five thousand, eight hundred fifty-one".