1268398959 has 8 divisors (see below), whose sum is σ = 1707618432. Its totient is φ = 837389400.

The previous prime is 1268398931. The next prime is 1268398973. The reversal of 1268398959 is 9598938621.

It is a happy number.

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

It is not a de Polignac number, because 1268398959 - 2¹² = 1268394863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268391959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052117 + ... + 2052734.

It is an arithmetic number, because the mean of its divisors is an integer number (213452304).

Almost surely, 2^1268398959 is an apocalyptic number.

1268398959 is a deficient number, since it is larger than the sum of its proper divisors (439219473).

1268398959 is a wasteful number, since it uses less digits than its factorization.

1268398959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104957.

The product of its digits is 8398080, while the sum is 60.

The square root of 1268398959 is about 35614.5891314220. The cubic root of 1268398959 is about 1082.4768709312.

The spelling of 1268398959 in words is "one billion, two hundred sixty-eight million, three hundred ninety-eight thousand, nine hundred fifty-nine".