1284641 has 2 divisors, whose sum is σ = 1284642. Its totient is φ = 1284640.

The previous prime is 1284631. The next prime is 1284659. The reversal of 1284641 is 1464821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 10000 = 1129^2 + 100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1284641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1284641.

It is not a weakly prime, because it can be changed into another prime (1284601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642320 + 642321.

It is an arithmetic number, because the mean of its divisors is an integer number (642321).

2^1284641 is an apocalyptic number.

It is an amenable number.

1284641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284641 is an equidigital number, since it uses as much as digits as its factorization.

1284641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 26.

The square root of 1284641 is about 1133.4200457024. The cubic root of 1284641 is about 108.7077715113.

The spelling of 1284641 in words is "one million, two hundred eighty-four thousand, six hundred forty-one".