12224537 has 4 divisors (see below), whose sum is σ = 13164900. Its totient is φ = 11284176.

The previous prime is 12224521. The next prime is 12224551. The reversal of 12224537 is 73542221.

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 3200521 + 9024016 = 1789^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 12224537 - 2⁴ = 12224521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12224557) 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, 470162 + ... + 470187.

It is an arithmetic number, because the mean of its divisors is an integer number (3291225).

Almost surely, 2^12224537 is an apocalyptic number.

It is an amenable number.

12224537 is a deficient number, since it is larger than the sum of its proper divisors (940363).

12224537 is an equidigital number, since it uses as much as digits as its factorization.

12224537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940362.

The product of its digits is 3360, while the sum is 26.

The square root of 12224537 is about 3496.3605363292. The cubic root of 12224537 is about 230.3619819862.

Adding to 12224537 its reverse (73542221), we get a palindrome (85766758).

The spelling of 12224537 in words is "twelve million, two hundred twenty-four thousand, five hundred thirty-seven".