1284873321 has 8 divisors (see below), whose sum is σ = 1720333440. Its totient is φ = 852997712.

The previous prime is 1284873319. The next prime is 1284873341. The reversal of 1284873321 is 1233784821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1284873321 - 2¹ = 1284873319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1284873321.

It is not an unprimeable number, because it can be changed into a prime (1284873341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895290 + ... + 896723.

It is an arithmetic number, because the mean of its divisors is an integer number (215041680).

Almost surely, 2^1284873321 is an apocalyptic number.

It is an amenable number.

1284873321 is a deficient number, since it is larger than the sum of its proper divisors (435460119).

1284873321 is a wasteful number, since it uses less digits than its factorization.

1284873321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792255.

The product of its digits is 64512, while the sum is 39.

The square root of 1284873321 is about 35845.1296691754. The cubic root of 1284873321 is about 1087.1432420471.

The spelling of 1284873321 in words is "one billion, two hundred eighty-four million, eight hundred seventy-three thousand, three hundred twenty-one".