1318371545 has 4 divisors (see below), whose sum is σ = 1582045860. Its totient is φ = 1054697232.

The previous prime is 1318371541. The next prime is 1318371553. The reversal of 1318371545 is 5451738131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 523357129 + 795014416 = 22877^2 + 28196^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318371545 - 2² = 1318371541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1318371499 and 1318371508.

It is not an unprimeable number, because it can be changed into a prime (1318371541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131837150 + ... + 131837159.

It is an arithmetic number, because the mean of its divisors is an integer number (395511465).

Almost surely, 2^1318371545 is an apocalyptic number.

It is an amenable number.

1318371545 is a deficient number, since it is larger than the sum of its proper divisors (263674315).

1318371545 is an equidigital number, since it uses as much as digits as its factorization.

1318371545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263674314.

The product of its digits is 50400, while the sum is 38.

The square root of 1318371545 is about 36309.3864586005. The cubic root of 1318371545 is about 1096.5100258327.

The spelling of 1318371545 in words is "one billion, three hundred eighteen million, three hundred seventy-one thousand, five hundred forty-five".