12128237 has 4 divisors (see below), whose sum is σ = 13230816. Its totient is φ = 11025660.

The previous prime is 12128231. The next prime is 12128239. The reversal of 12128237 is 73282121.

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 not a de Polignac number, because 12128237 - 2⁶ = 12128173 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 (12128231) 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, 551273 + ... + 551294.

It is an arithmetic number, because the mean of its divisors is an integer number (3307704).

Almost surely, 2^12128237 is an apocalyptic number.

It is an amenable number.

12128237 is a deficient number, since it is larger than the sum of its proper divisors (1102579).

12128237 is a wasteful number, since it uses less digits than its factorization.

12128237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102578.

The product of its digits is 1344, while the sum is 26.

The square root of 12128237 is about 3482.5618443898. The cubic root of 12128237 is about 229.7554868419.

It can be divided in two parts, 1212 and 8237, that added together give a palindrome (9449).

The spelling of 12128237 in words is "twelve million, one hundred twenty-eight thousand, two hundred thirty-seven".