1287339 has 8 divisors (see below), whose sum is σ = 1775760. Its totient is φ = 828576.

The previous prime is 1287329. The next prime is 1287343. The reversal of 1287339 is 9337821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1287339 - 2⁴ = 1287323 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 7 ways as a sum of consecutive naturals, for example, 7312 + ... + 7485.

It is an arithmetic number, because the mean of its divisors is an integer number (221970).

2^1287339 is an apocalyptic number.

1287339 is a deficient number, since it is larger than the sum of its proper divisors (488421).

1287339 is a wasteful number, since it uses less digits than its factorization.

1287339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14829.

The product of its digits is 9072, while the sum is 33.

The square root of 1287339 is about 1134.6096244965. The cubic root of 1287339 is about 108.7838208983.

The spelling of 1287339 in words is "one million, two hundred eighty-seven thousand, three hundred thirty-nine".