1281360143 has 6 divisors (see below), whose sum is σ = 1490561856. Its totient is φ = 1098308652.

The previous prime is 1281360137. The next prime is 1281360149. The reversal of 1281360143 is 3410631821.

It is an interprime number because it is at equal distance from previous prime (1281360137) and next prime (1281360149).

It is not a de Polignac number, because 1281360143 - 2¹⁰ = 1281359119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281360149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13075055 + ... + 13075152.

It is an arithmetic number, because the mean of its divisors is an integer number (248426976).

Almost surely, 2^1281360143 is an apocalyptic number.

1281360143 is a deficient number, since it is larger than the sum of its proper divisors (209201713).

1281360143 is an equidigital number, since it uses as much as digits as its factorization.

1281360143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26150221 (or 26150214 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1281360143 is about 35796.0911692883. The cubic root of 1281360143 is about 1086.1514934267.

Adding to 1281360143 its reverse (3410631821), we get a palindrome (4691991964).

The spelling of 1281360143 in words is "one billion, two hundred eighty-one million, three hundred sixty thousand, one hundred forty-three".