1284316421 has 4 divisors (see below), whose sum is σ = 1286069292. Its totient is φ = 1282563552.

The previous prime is 1284316403. The next prime is 1284316469. The reversal of 1284316421 is 1246134821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1199860321 + 84456100 = 34639^2 + 9190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284316421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284316471) 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 in 3 ways as a sum of consecutive naturals, for example, 875336 + ... + 876801.

It is an arithmetic number, because the mean of its divisors is an integer number (321517323).

Almost surely, 2^1284316421 is an apocalyptic number.

It is an amenable number.

1284316421 is a deficient number, since it is larger than the sum of its proper divisors (1752871).

1284316421 is an equidigital number, since it uses as much as digits as its factorization.

1284316421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752870.

The product of its digits is 9216, while the sum is 32.

The square root of 1284316421 is about 35837.3606868586. The cubic root of 1284316421 is about 1086.9861532631.

The spelling of 1284316421 in words is "one billion, two hundred eighty-four million, three hundred sixteen thousand, four hundred twenty-one".