1284697121 has 2 divisors, whose sum is σ = 1284697122. Its totient is φ = 1284697120.

The previous prime is 1284697109. The next prime is 1284697153. The reversal of 1284697121 is 1217964821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1277347600 + 7349521 = 35740^2 + 2711^2 .

It is an emirp because it is prime and its reverse (1217964821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284697121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1284697621) 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, 642348560 + 642348561.

It is an arithmetic number, because the mean of its divisors is an integer number (642348561).

Almost surely, 2^1284697121 is an apocalyptic number.

It is an amenable number.

1284697121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284697121 is an equidigital number, since it uses as much as digits as its factorization.

1284697121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 1284697121 is about 35842.6717893630. The cubic root of 1284697121 is about 1087.0935449568.

The spelling of 1284697121 in words is "one billion, two hundred eighty-four million, six hundred ninety-seven thousand, one hundred twenty-one".