1247795359 has 6 divisors (see below), whose sum is σ = 1325513024. Its totient is φ = 1174395360.

The previous prime is 1247795281. The next prime is 1247795369. The reversal of 1247795359 is 9535977421.

It is a de Polignac number, because none of the positive numbers 2^k-1247795359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247795369) 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 5 ways as a sum of consecutive naturals, for example, 2158527 + ... + 2159104.

Almost surely, 2^1247795359 is an apocalyptic number.

1247795359 is a deficient number, since it is larger than the sum of its proper divisors (77717665).

1247795359 is an equidigital number, since it uses as much as digits as its factorization.

1247795359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317665 (or 4317648 counting only the distinct ones).

The product of its digits is 2381400, while the sum is 52.

The square root of 1247795359 is about 35324.1469677613. The cubic root of 1247795359 is about 1076.5836716573.

The spelling of 1247795359 in words is "one billion, two hundred forty-seven million, seven hundred ninety-five thousand, three hundred fifty-nine".