1268825391 has 20 divisors (see below), whose sum is σ = 1898876232. Its totient is φ = 844334928.

The previous prime is 1268825347. The next prime is 1268825407. The reversal of 1268825391 is 1935288621.

It is not a de Polignac number, because 1268825391 - 2¹⁰ = 1268824367 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268825321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31056 + ... + 59178.

Almost surely, 2^1268825391 is an apocalyptic number.

1268825391 is a deficient number, since it is larger than the sum of its proper divisors (630050841).

1268825391 is an equidigital number, since it uses as much as digits as its factorization.

1268825391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28692 (or 28683 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1268825391 is about 35620.5753883903. The cubic root of 1268825391 is about 1082.5981658528.

The spelling of 1268825391 in words is "one billion, two hundred sixty-eight million, eight hundred twenty-five thousand, three hundred ninety-one".