12239271 has 18 divisors (see below), whose sum is σ = 19433960. Its totient is φ = 7417080.

The previous prime is 12239261. The next prime is 12239273. The reversal of 12239271 is 17293221.

It is not a de Polignac number, because 12239271 - 2¹⁵ = 12206503 is a prime.

It is a super-2 number, since 2×12239271² = 299599509222882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239273) 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 17 ways as a sum of consecutive naturals, for example, 4531 + ... + 6708.

Almost surely, 2^12239271 is an apocalyptic number.

12239271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12239271 is a deficient number, since it is larger than the sum of its proper divisors (7194689).

12239271 is a wasteful number, since it uses less digits than its factorization.

12239271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11267 (or 11253 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 12239271 is about 3498.4669499654. The cubic root of 12239271 is about 230.4544951210.

It can be divided in two parts, 122 and 39271, that added together give a palindrome (39393).

The spelling of 12239271 in words is "twelve million, two hundred thirty-nine thousand, two hundred seventy-one".