12543131 has 2 divisors, whose sum is σ = 12543132. Its totient is φ = 12543130.

The previous prime is 12543121. The next prime is 12543151. The reversal of 12543131 is 13134521.

It is an a-pointer prime, because the next prime (12543151) can be obtained adding 12543131 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12543131 - 2¹⁴ = 12526747 is a prime.

It is a super-2 number, since 2×12543131² = 314660270566322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12543121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271565 + 6271566.

It is an arithmetic number, because the mean of its divisors is an integer number (6271566).

Almost surely, 2^12543131 is an apocalyptic number.

12543131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543131 is an equidigital number, since it uses as much as digits as its factorization.

12543131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 12543131 is about 3541.6282978314. The cubic root of 12543131 is about 232.3460637480.

Adding to 12543131 its reverse (13134521), we get a palindrome (25677652).

The spelling of 12543131 in words is "twelve million, five hundred forty-three thousand, one hundred thirty-one".