1281983 has 2 divisors, whose sum is σ = 1281984. Its totient is φ = 1281982.

The previous prime is 1281979. The next prime is 1282007. The reversal of 1281983 is 3891821.

It is a weak prime.

It is an emirp because it is prime and its reverse (3891821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1281983 - 2² = 1281979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640991 + 640992.

It is an arithmetic number, because the mean of its divisors is an integer number (640992).

2^1281983 is an apocalyptic number.

1281983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281983 is an equidigital number, since it uses as much as digits as its factorization.

1281983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 1281983 is about 1132.2468812057. The cubic root of 1281983 is about 108.6327454228.

The spelling of 1281983 in words is "one million, two hundred eighty-one thousand, nine hundred eighty-three".