1317425345 has 4 divisors (see below), whose sum is σ = 1580910420. Its totient is φ = 1053940272.

The previous prime is 1317425327. The next prime is 1317425381. The reversal of 1317425345 is 5435247131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5435247131 = 757 ⋅7179983.

It can be written as a sum of positive squares in 2 ways, for example, as 445758769 + 871666576 = 21113^2 + 29524^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317425345 - 2⁶ = 1317425281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131742530 + ... + 131742539.

It is an arithmetic number, because the mean of its divisors is an integer number (395227605).

Almost surely, 2^1317425345 is an apocalyptic number.

It is an amenable number.

1317425345 is a deficient number, since it is larger than the sum of its proper divisors (263485075).

1317425345 is an equidigital number, since it uses as much as digits as its factorization.

1317425345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263485074.

The product of its digits is 50400, while the sum is 35.

The square root of 1317425345 is about 36296.3544312649. The cubic root of 1317425345 is about 1096.2476399877.

The spelling of 1317425345 in words is "one billion, three hundred seventeen million, four hundred twenty-five thousand, three hundred forty-five".