1284791 has 2 divisors, whose sum is σ = 1284792. Its totient is φ = 1284790.

The previous prime is 1284769. The next prime is 1284793. The reversal of 1284791 is 1974821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1284791 - 2¹⁰ = 1283767 is a prime.

Together with 1284793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284793) 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, 642395 + 642396.

It is an arithmetic number, because the mean of its divisors is an integer number (642396).

2^1284791 is an apocalyptic number.

1284791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284791 is an equidigital number, since it uses as much as digits as its factorization.

1284791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 1284791 is about 1133.4862151786. The cubic root of 1284791 is about 108.7120024030.

The spelling of 1284791 in words is "one million, two hundred eighty-four thousand, seven hundred ninety-one".