1283287 has 4 divisors (see below), whose sum is σ = 1287496. Its totient is φ = 1279080.

The previous prime is 1283237. The next prime is 1283297. The reversal of 1283287 is 7823821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7823821 = 499 ⋅15679.

It is a cyclic number.

It is not a de Polignac number, because 1283287 - 2⁷ = 1283159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (321874).

2^1283287 is an apocalyptic number.

1283287 is a deficient number, since it is larger than the sum of its proper divisors (4209).

1283287 is an equidigital number, since it uses as much as digits as its factorization.

1283287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208.

The product of its digits is 5376, while the sum is 31.

The square root of 1283287 is about 1132.8225809896. The cubic root of 1283287 is about 108.6695657492.

The spelling of 1283287 in words is "one million, two hundred eighty-three thousand, two hundred eighty-seven".