1317245205 has 16 divisors (see below), whose sum is σ = 2218518720. Its totient is φ = 665555328.

The previous prime is 1317245197. The next prime is 1317245233. The reversal of 1317245205 is 5025427131.

It is not a de Polignac number, because 1317245205 - 2³ = 1317245197 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2310672 + ... + 2311241.

It is an arithmetic number, because the mean of its divisors is an integer number (138657420).

Almost surely, 2^1317245205 is an apocalyptic number.

1317245205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1317245205 is a deficient number, since it is larger than the sum of its proper divisors (901273515).

1317245205 is a wasteful number, since it uses less digits than its factorization.

1317245205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621940.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 1317245205 is about 36293.8728299971. The cubic root of 1317245205 is about 1096.1976720579.

The spelling of 1317245205 in words is "one billion, three hundred seventeen million, two hundred forty-five thousand, two hundred five".