1268309 has 8 divisors (see below), whose sum is σ = 1456320. Its totient is φ = 1082016.

The previous prime is 1268299. The next prime is 1268327. The reversal of 1268309 is 9038621.

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

It is a cyclic number.

It is not a de Polignac number, because 1268309 - 2⁸ = 1268053 is a prime.

It is a Duffinian number.

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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2642 + ... + 3084.

It is an arithmetic number, because the mean of its divisors is an integer number (182040).

2^1268309 is an apocalyptic number.

It is an amenable number.

1268309 is a deficient number, since it is larger than the sum of its proper divisors (188011).

1268309 is an equidigital number, since it uses as much as digits as its factorization.

1268309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1268309 is about 1126.1922571213. The cubic root of 1268309 is about 108.2451279394.

The spelling of 1268309 in words is "one million, two hundred sixty-eight thousand, three hundred nine".