1317210640 has 40 divisors (see below), whose sum is σ = 3064053888. Its totient is φ = 526619520.

The previous prime is 1317210617. The next prime is 1317210641. The reversal of 1317210640 is 460127131.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1317210641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264009 + ... + 268951.

Almost surely, 2^1317210640 is an apocalyptic number.

1317210640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317210640 is an abundant number, since it is smaller than the sum of its proper divisors (1746843248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1317210640 is a wasteful number, since it uses less digits than its factorization.

1317210640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8287 (or 8281 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1317210640 is about 36293.3966445688. The cubic root of 1317210640 is about 1096.1880837636.

Adding to 1317210640 its reverse (460127131), we get a palindrome (1777337771).

The spelling of 1317210640 in words is "one billion, three hundred seventeen million, two hundred ten thousand, six hundred forty".