1284065 has 4 divisors (see below), whose sum is σ = 1540884. Its totient is φ = 1027248.

The previous prime is 1284053. The next prime is 1284083. The reversal of 1284065 is 5604821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5604821 = 811 ⋅6911.

It can be written as a sum of positive squares in 2 ways, for example, as 185761 + 1098304 = 431^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284065 - 2¹² = 1279969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128402 + ... + 128411.

It is an arithmetic number, because the mean of its divisors is an integer number (385221).

2^1284065 is an apocalyptic number.

It is an amenable number.

1284065 is a deficient number, since it is larger than the sum of its proper divisors (256819).

1284065 is an equidigital number, since it uses as much as digits as its factorization.

1284065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256818.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1284065 is about 1133.1659190075. The cubic root of 1284065 is about 108.6915218257.

Adding to 1284065 its reverse (5604821), we get a palindrome (6888886).

The spelling of 1284065 in words is "one million, two hundred eighty-four thousand, sixty-five".