12136205 has 16 divisors (see below), whose sum is σ = 15213744. Its totient is φ = 9285120.

The previous prime is 12136171. The next prime is 12136211. The reversal of 12136205 is 50263121.

It can be written as a sum of positive squares in 8 ways, for example, as 3052009 + 9084196 = 1747^2 + 3014^2 .

It is not a de Polignac number, because 12136205 - 2⁶ = 12136141 is a prime.

It is a Duffinian number.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 10307 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (950859).

Almost surely, 2^12136205 is an apocalyptic number.

It is an amenable number.

12136205 is a deficient number, since it is larger than the sum of its proper divisors (3077539).

12136205 is a wasteful number, since it uses less digits than its factorization.

12136205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12136205 is about 3483.7056419853. The cubic root of 12136205 is about 229.8057906895.

Adding to 12136205 its reverse (50263121), we get a palindrome (62399326).

The spelling of 12136205 in words is "twelve million, one hundred thirty-six thousand, two hundred five".