1284851 has 2 divisors, whose sum is σ = 1284852. Its totient is φ = 1284850.

The previous prime is 1284847. The next prime is 1284863. The reversal of 1284851 is 1584821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1284851 - 2² = 1284847 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1284841) 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, 642425 + 642426.

It is an arithmetic number, because the mean of its divisors is an integer number (642426).

2^1284851 is an apocalyptic number.

1284851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284851 is an equidigital number, since it uses as much as digits as its factorization.

1284851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 29.

The square root of 1284851 is about 1133.5126818876. The cubic root of 1284851 is about 108.7136946676.

The spelling of 1284851 in words is "one million, two hundred eighty-four thousand, eight hundred fifty-one".