1281463 has 2 divisors, whose sum is σ = 1281464. Its totient is φ = 1281462.

The previous prime is 1281457. The next prime is 1281503. The reversal of 1281463 is 3641821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1281463 - 2⁵ = 1281431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640731 + 640732.

It is an arithmetic number, because the mean of its divisors is an integer number (640732).

2^1281463 is an apocalyptic number.

1281463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281463 is an equidigital number, since it uses as much as digits as its factorization.

1281463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 1281463 is about 1132.0172260173. The cubic root of 1281463 is about 108.6180555070.

The spelling of 1281463 in words is "one million, two hundred eighty-one thousand, four hundred sixty-three".