1280885143 has 2 divisors, whose sum is σ = 1280885144. Its totient is φ = 1280885142.

The previous prime is 1280885117. The next prime is 1280885153. The reversal of 1280885143 is 3415880821.

It is a strong prime.

It is an emirp because it is prime and its reverse (3415880821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1280885143 is a prime.

It is a super-3 number, since 3×1280885143³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1280885096 and 1280885105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1280885153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640442571 + 640442572.

It is an arithmetic number, because the mean of its divisors is an integer number (640442572).

Almost surely, 2^1280885143 is an apocalyptic number.

1280885143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280885143 is an equidigital number, since it uses as much as digits as its factorization.

1280885143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 1280885143 is about 35789.4557516596. The cubic root of 1280885143 is about 1086.0172647776.

The spelling of 1280885143 in words is "one billion, two hundred eighty million, eight hundred eighty-five thousand, one hundred forty-three".