1317100427 has 4 divisors (see below), whose sum is σ = 1322565816. Its totient is φ = 1311635040.

The previous prime is 1317100417. The next prime is 1317100459. The reversal of 1317100427 is 7240017131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1317100427 - 2¹⁸ = 1316838283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1317100396 and 1317100405.

It is not an unprimeable number, because it can be changed into a prime (1317100417) 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, 2732333 + ... + 2732814.

It is an arithmetic number, because the mean of its divisors is an integer number (330641454).

Almost surely, 2^1317100427 is an apocalyptic number.

1317100427 is a deficient number, since it is larger than the sum of its proper divisors (5465389).

1317100427 is an equidigital number, since it uses as much as digits as its factorization.

1317100427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465388.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1317100427 is about 36291.8782512011. The cubic root of 1317100427 is about 1096.1575096744.

Adding to 1317100427 its reverse (7240017131), we get a palindrome (8557117558).

The spelling of 1317100427 in words is "one billion, three hundred seventeen million, one hundred thousand, four hundred twenty-seven".