1317128506 has 8 divisors (see below), whose sum is σ = 1976429664. Its totient is φ = 658318620.

The previous prime is 1317128503. The next prime is 1317128569. The reversal of 1317128506 is 6058217131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1317128503) 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, 116040 + ... + 126883.

It is an arithmetic number, because the mean of its divisors is an integer number (247053708).

Almost surely, 2^1317128506 is an apocalyptic number.

1317128506 is a deficient number, since it is larger than the sum of its proper divisors (659301158).

1317128506 is a wasteful number, since it uses less digits than its factorization.

1317128506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245636.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1317128506 is about 36292.2650987783. The cubic root of 1317128506 is about 1096.1652992065.

The spelling of 1317128506 in words is "one billion, three hundred seventeen million, one hundred twenty-eight thousand, five hundred six".