1268399 has 4 divisors (see below), whose sum is σ = 1383720. Its totient is φ = 1153080.

The previous prime is 1268369. The next prime is 1268413. The reversal of 1268399 is 9938621.

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 1268399 - 2⁸ = 1268143 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57644 + ... + 57665.

It is an arithmetic number, because the mean of its divisors is an integer number (345930).

2^1268399 is an apocalyptic number.

1268399 is a deficient number, since it is larger than the sum of its proper divisors (115321).

1268399 is a wasteful number, since it uses less digits than its factorization.

1268399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115320.

The product of its digits is 23328, while the sum is 38.

The square root of 1268399 is about 1126.2322140660. The cubic root of 1268399 is about 108.2476882595.

The spelling of 1268399 in words is "one million, two hundred sixty-eight thousand, three hundred ninety-nine".