12488142781 has 2 divisors, whose sum is σ = 12488142782. Its totient is φ = 12488142780.

The previous prime is 12488142773. The next prime is 12488142817. The reversal of 12488142781 is 18724188421.

Together with next prime (12488142817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6615219556 + 5872923225 = 81334^2 + 76635^2 .

It is a cyclic number.

It is not a de Polignac number, because 12488142781 - 2³ = 12488142773 is a prime.

It is a super-2 number, since 2×12488142781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12488142281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6244071390 + 6244071391.

It is an arithmetic number, because the mean of its divisors is an integer number (6244071391).

Almost surely, 2^12488142781 is an apocalyptic number.

It is an amenable number.

12488142781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12488142781 is an equidigital number, since it uses as much as digits as its factorization.

12488142781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229376, while the sum is 46.

The spelling of 12488142781 in words is "twelve billion, four hundred eighty-eight million, one hundred forty-two thousand, seven hundred eighty-one".