12226537 has 2 divisors, whose sum is σ = 12226538. Its totient is φ = 12226536.

The previous prime is 12226507. The next prime is 12226549. The reversal of 12226537 is 73562221.

12226537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is the 1428-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6130576 + 6095961 = 2476^2 + 2469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12226537 is a prime.

It is not a weakly prime, because it can be changed into another prime (12226507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6113268 + 6113269.

It is an arithmetic number, because the mean of its divisors is an integer number (6113269).

Almost surely, 2^12226537 is an apocalyptic number.

It is an amenable number.

12226537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12226537 is an equidigital number, since it uses as much as digits as its factorization.

12226537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 12226537 is about 3496.6465363259. The cubic root of 12226537 is about 230.3745441209.

Adding to 12226537 its reverse (73562221), we get a palindrome (85788758).

The spelling of 12226537 in words is "twelve million, two hundred twenty-six thousand, five hundred thirty-seven".