12013237 has 4 divisors (see below), whose sum is σ = 12719916. Its totient is φ = 11306560.

The previous prime is 12013229. The next prime is 12013259. The reversal of 12013237 is 73231021.

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 9326916 + 2686321 = 3054^2 + 1639^2 .

It is a cyclic number.

It is not a de Polignac number, because 12013237 - 2³ = 12013229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013207) 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, 353314 + ... + 353347.

It is an arithmetic number, because the mean of its divisors is an integer number (3179979).

Almost surely, 2^12013237 is an apocalyptic number.

12013237 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12013237 is a deficient number, since it is larger than the sum of its proper divisors (706679).

12013237 is an equidigital number, since it uses as much as digits as its factorization.

12013237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706678.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12013237 is about 3466.0116849197. The cubic root of 12013237 is about 229.0269985902.

Adding to 12013237 its reverse (73231021), we get a palindrome (85244258).

The spelling of 12013237 in words is "twelve million, thirteen thousand, two hundred thirty-seven".