12231261 has 24 divisors (see below), whose sum is σ = 20342400. Its totient is φ = 6937056.

The previous prime is 12231259. The next prime is 12231283. The reversal of 12231261 is 16213221.

It is not a de Polignac number, because 12231261 - 2¹ = 12231259 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231061) 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 23 ways as a sum of consecutive naturals, for example, 8736 + ... + 10038.

It is an arithmetic number, because the mean of its divisors is an integer number (847600).

Almost surely, 2^12231261 is an apocalyptic number.

It is an amenable number.

12231261 is a deficient number, since it is larger than the sum of its proper divisors (8111139).

12231261 is a wasteful number, since it uses less digits than its factorization.

12231261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1462 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12231261 is about 3497.3219754549. The cubic root of 12231261 is about 230.4042104446.

Adding to 12231261 its reverse (16213221), we get a palindrome (28444482).

The spelling of 12231261 in words is "twelve million, two hundred thirty-one thousand, two hundred sixty-one".