1268429691 has 16 divisors (see below), whose sum is σ = 1784609280. Its totient is φ = 799761600.

The previous prime is 1268429641. The next prime is 1268429711. The reversal of 1268429691 is 1969248621.

It is not a de Polignac number, because 1268429691 - 2⁷ = 1268429563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268429691.

It is not an unprimeable number, because it can be changed into a prime (1268429611) 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 15 ways as a sum of consecutive naturals, for example, 97135 + ... + 109416.

It is an arithmetic number, because the mean of its divisors is an integer number (111538080).

Almost surely, 2^1268429691 is an apocalyptic number.

1268429691 is a deficient number, since it is larger than the sum of its proper divisors (516179589).

1268429691 is a wasteful number, since it uses less digits than its factorization.

1268429691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206666.

The product of its digits is 373248, while the sum is 48.

The square root of 1268429691 is about 35615.0205812098. The cubic root of 1268429691 is about 1082.4856132937.

The spelling of 1268429691 in words is "one billion, two hundred sixty-eight million, four hundred twenty-nine thousand, six hundred ninety-one".