12861481 has 2 divisors, whose sum is σ = 12861482. Its totient is φ = 12861480.

The previous prime is 12861467. The next prime is 12861493. The reversal of 12861481 is 18416821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6656400 + 6205081 = 2580^2 + 2491^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861481 - 2¹¹ = 12859433 is a prime.

It is a super-2 number, since 2×12861481² = 330835387026722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12861421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430740 + 6430741.

It is an arithmetic number, because the mean of its divisors is an integer number (6430741).

Almost surely, 2^12861481 is an apocalyptic number.

It is an amenable number.

12861481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861481 is an equidigital number, since it uses as much as digits as its factorization.

12861481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 12861481 is about 3586.2907021043. The cubic root of 12861481 is about 234.2953450440.

The spelling of 12861481 in words is "twelve million, eight hundred sixty-one thousand, four hundred eighty-one".