1287303 has 4 divisors (see below), whose sum is σ = 1716408. Its totient is φ = 858200.

The previous prime is 1287289. The next prime is 1287323. The reversal of 1287303 is 3037821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1287303 - 2⁶ = 1287239 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287323) 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, 214548 + ... + 214553.

It is an arithmetic number, because the mean of its divisors is an integer number (429102).

2^1287303 is an apocalyptic number.

1287303 is a deficient number, since it is larger than the sum of its proper divisors (429105).

1287303 is an equidigital number, since it uses as much as digits as its factorization.

1287303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429104.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 1287303 is about 1134.5937598982. The cubic root of 1287303 is about 108.7828068546.

The spelling of 1287303 in words is "one million, two hundred eighty-seven thousand, three hundred three".