1287323 has 2 divisors, whose sum is σ = 1287324. Its totient is φ = 1287322.

The previous prime is 1287289. The next prime is 1287329. The reversal of 1287323 is 3237821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287323 - 2⁸ = 1287067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287292 and 1287301.

It is not a weakly prime, because it can be changed into another prime (1287329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643661 + 643662.

It is an arithmetic number, because the mean of its divisors is an integer number (643662).

2^1287323 is an apocalyptic number.

1287323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287323 is an equidigital number, since it uses as much as digits as its factorization.

1287323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 1287323 is about 1134.6025735913. The cubic root of 1287323 is about 108.7833702146.

The spelling of 1287323 in words is "one million, two hundred eighty-seven thousand, three hundred twenty-three".