11721206 has 16 divisors (see below), whose sum is σ = 20280480. Its totient is φ = 4976640.

The previous prime is 11721187. The next prime is 11721209. The reversal of 11721206 is 60212711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2315 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (1267530).

Almost surely, 2^11721206 is an apocalyptic number.

11721206 is a deficient number, since it is larger than the sum of its proper divisors (8559274).

11721206 is a wasteful number, since it uses less digits than its factorization.

11721206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7799.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 11721206 is about 3423.6246873745. The cubic root of 11721206 is about 227.1559409002.

Adding to 11721206 its reverse (60212711), we get a palindrome (71933917).

The spelling of 11721206 in words is "eleven million, seven hundred twenty-one thousand, two hundred six".