12431261 has 8 divisors (see below), whose sum is σ = 12603864. Its totient is φ = 12260160.

The previous prime is 12431239. The next prime is 12431281. The reversal of 12431261 is 16213421.

It can be written as a sum of positive squares in 4 ways, for example, as 1705636 + 10725625 = 1306^2 + 3275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12431261 - 2⁶ = 12431197 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 (12431281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31115 + ... + 31511.

It is an arithmetic number, because the mean of its divisors is an integer number (1575483).

Almost surely, 2^12431261 is an apocalyptic number.

It is an amenable number.

12431261 is a deficient number, since it is larger than the sum of its proper divisors (172603).

12431261 is a wasteful number, since it uses less digits than its factorization.

12431261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751.

The product of its digits is 288, while the sum is 20.

The square root of 12431261 is about 3525.7993419932. The cubic root of 12431261 is about 231.6532485946.

Adding to 12431261 its reverse (16213421), we get a palindrome (28644682).

The spelling of 12431261 in words is "twelve million, four hundred thirty-one thousand, two hundred sixty-one".