1268735247 has 36 divisors (see below), whose sum is σ = 1990547832. Its totient is φ = 774100800.

The previous prime is 1268735243. The next prime is 1268735267. The reversal of 1268735247 is 7425378621.

It is not a de Polignac number, because 1268735247 - 2² = 1268735243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268735243) 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 35 ways as a sum of consecutive naturals, for example, 3832872 + ... + 3833202.

Almost surely, 2^1268735247 is an apocalyptic number.

1268735247 is a deficient number, since it is larger than the sum of its proper divisors (721812585).

1268735247 is a wasteful number, since it uses less digits than its factorization.

1268735247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 528 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 1268735247 is about 35619.3100298139. The cubic root of 1268735247 is about 1082.5725274313.

The spelling of 1268735247 in words is "one billion, two hundred sixty-eight million, seven hundred thirty-five thousand, two hundred forty-seven".