1281284503 has 2 divisors, whose sum is σ = 1281284504. Its totient is φ = 1281284502.

The previous prime is 1281284471. The next prime is 1281284561. The reversal of 1281284503 is 3054821821.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281284503 - 2⁵ = 1281284471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281281503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640642251 + 640642252.

It is an arithmetic number, because the mean of its divisors is an integer number (640642252).

Almost surely, 2^1281284503 is an apocalyptic number.

1281284503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281284503 is an equidigital number, since it uses as much as digits as its factorization.

1281284503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1281284503 is about 35795.0346137561. The cubic root of 1281284503 is about 1086.1301207949.

The spelling of 1281284503 in words is "one billion, two hundred eighty-one million, two hundred eighty-four thousand, five hundred three".