1288339 has 4 divisors (see below), whose sum is σ = 1387456. Its totient is φ = 1189224.

The previous prime is 1288337. The next prime is 1288349. The reversal of 1288339 is 9338821.

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 1288339 - 2¹ = 1288337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1288337) 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, 49539 + ... + 49564.

It is an arithmetic number, because the mean of its divisors is an integer number (346864).

2^1288339 is an apocalyptic number.

1288339 is a deficient number, since it is larger than the sum of its proper divisors (99117).

1288339 is an equidigital number, since it uses as much as digits as its factorization.

1288339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99116.

The product of its digits is 10368, while the sum is 34.

The square root of 1288339 is about 1135.0502191533. The cubic root of 1288339 is about 108.8119812263.

The spelling of 1288339 in words is "one million, two hundred eighty-eight thousand, three hundred thirty-nine".