12271137 has 4 divisors (see below), whose sum is σ = 16361520. Its totient is φ = 8180756.

The previous prime is 12271123. The next prime is 12271141. The reversal of 12271137 is 73117221.

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 12271137 - 2⁶ = 12271073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12271157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045187 + ... + 2045192.

It is an arithmetic number, because the mean of its divisors is an integer number (4090380).

Almost surely, 2^12271137 is an apocalyptic number.

It is an amenable number.

12271137 is a deficient number, since it is larger than the sum of its proper divisors (4090383).

12271137 is an equidigital number, since it uses as much as digits as its factorization.

12271137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4090382.

The product of its digits is 588, while the sum is 24.

The square root of 12271137 is about 3503.0182700066. The cubic root of 12271137 is about 230.6543245296.

Adding to 12271137 its reverse (73117221), we get a palindrome (85388358).

The spelling of 12271137 in words is "twelve million, two hundred seventy-one thousand, one hundred thirty-seven".