1268739 has 12 divisors (see below), whose sum is σ = 1863472. Its totient is φ = 831600.

The previous prime is 1268731. The next prime is 1268741. The reversal of 1268739 is 9378621.

It is not a de Polignac number, because 1268739 - 2³ = 1268731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 607 + ... + 1704.

2^1268739 is an apocalyptic number.

1268739 is a deficient number, since it is larger than the sum of its proper divisors (594733).

1268739 is a wasteful number, since it uses less digits than its factorization.

1268739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378 (or 2375 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1268739 is about 1126.3831497319. The cubic root of 1268739 is about 108.2573594870.

The spelling of 1268739 in words is "one million, two hundred sixty-eight thousand, seven hundred thirty-nine".