1317972942 has 96 divisors (see below), whose sum is σ = 3418492896. Its totient is φ = 361670400.

The previous prime is 1317972941. The next prime is 1317972949. The reversal of 1317972942 is 2492797131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317972941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131592 + ... + 141252.

It is an arithmetic number, because the mean of its divisors is an integer number (35609301).

Almost surely, 2^1317972942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317972942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709246448).

1317972942 is an abundant number, since it is smaller than the sum of its proper divisors (2100519954).

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

1317972942 is a wasteful number, since it uses less digits than its factorization.

1317972942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9746 (or 9743 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 1317972942 is about 36303.8970635385. The cubic root of 1317972942 is about 1096.3995065981.

The spelling of 1317972942 in words is "one billion, three hundred seventeen million, nine hundred seventy-two thousand, nine hundred forty-two".