12136445 has 4 divisors (see below), whose sum is σ = 14563740. Its totient is φ = 9709152.

The previous prime is 12136441. The next prime is 12136457. The reversal of 12136445 is 54463121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1338649 + 10797796 = 1157^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 12136445 - 2² = 12136441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12136441) 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, 1213640 + ... + 1213649.

It is an arithmetic number, because the mean of its divisors is an integer number (3640935).

Almost surely, 2^12136445 is an apocalyptic number.

It is an amenable number.

12136445 is a deficient number, since it is larger than the sum of its proper divisors (2427295).

12136445 is an equidigital number, since it uses as much as digits as its factorization.

12136445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427294.

The product of its digits is 2880, while the sum is 26.

The square root of 12136445 is about 3483.7400878940. The cubic root of 12136445 is about 229.8073055240.

Adding to 12136445 its reverse (54463121), we get a palindrome (66599566).

The spelling of 12136445 in words is "twelve million, one hundred thirty-six thousand, four hundred forty-five".