12205672 has 8 divisors (see below), whose sum is σ = 22885650. Its totient is φ = 6102832.

The previous prime is 12205649. The next prime is 12205691. The reversal of 12205672 is 27650221.

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 5885476 = 2514^2 + 2426^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 762847 + ... + 762862.

Almost surely, 2^12205672 is an apocalyptic number.

It is an amenable number.

12205672 is a deficient number, since it is larger than the sum of its proper divisors (10679978).

12205672 is a wasteful number, since it uses less digits than its factorization.

12205672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525715 (or 1525711 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 12205672 is about 3493.6616894027. The cubic root of 12205672 is about 230.2434221806.

Adding to 12205672 its reverse (27650221), we get a palindrome (39855893).

The spelling of 12205672 in words is "twelve million, two hundred five thousand, six hundred seventy-two".