1317279745 has 16 divisors (see below), whose sum is σ = 1635913728. Its totient is φ = 1017213120.

The previous prime is 1317279737. The next prime is 1317279749. The reversal of 1317279745 is 5479727131.

It is not a de Polignac number, because 1317279745 - 2³ = 1317279737 is a prime.

It is a super-3 number, since 3×1317279745³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1317279695 and 1317279704.

It is not an unprimeable number, because it can be changed into a prime (1317279749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50832 + ... + 72238.

It is an arithmetic number, because the mean of its divisors is an integer number (102244608).

Almost surely, 2^1317279745 is an apocalyptic number.

It is an amenable number.

1317279745 is a deficient number, since it is larger than the sum of its proper divisors (318633983).

1317279745 is a wasteful number, since it uses less digits than its factorization.

1317279745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21840.

The product of its digits is 370440, while the sum is 46.

The square root of 1317279745 is about 36294.3486647715. The cubic root of 1317279745 is about 1096.2072532497.

The spelling of 1317279745 in words is "one billion, three hundred seventeen million, two hundred seventy-nine thousand, seven hundred forty-five".