12225137 has 4 divisors (see below), whose sum is σ = 12258816. Its totient is φ = 12191460.

The previous prime is 12225107. The next prime is 12225149. The reversal of 12225137 is 73152221.

It is a happy number.

12225137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12225137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12225107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16289 + ... + 17022.

It is an arithmetic number, because the mean of its divisors is an integer number (3064704).

Almost surely, 2^12225137 is an apocalyptic number.

It is an amenable number.

12225137 is a deficient number, since it is larger than the sum of its proper divisors (33679).

12225137 is an equidigital number, since it uses as much as digits as its factorization.

12225137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33678.

The product of its digits is 840, while the sum is 23.

The square root of 12225137 is about 3496.4463387846. The cubic root of 12225137 is about 230.3657507704.

Adding to 12225137 its reverse (73152221), we get a palindrome (85377358).

The spelling of 12225137 in words is "twelve million, two hundred twenty-five thousand, one hundred thirty-seven".