1317172154 has 4 divisors (see below), whose sum is σ = 1975758234. Its totient is φ = 658586076.

The previous prime is 1317172127. The next prime is 1317172231. The reversal of 1317172154 is 4512717131.

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

It can be written as a sum of positive squares in only one way, i.e., 1064521129 + 252651025 = 32627^2 + 15895^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1317172154.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329293037 + ... + 329293040.

Almost surely, 2^1317172154 is an apocalyptic number.

1317172154 is a deficient number, since it is larger than the sum of its proper divisors (658586080).

1317172154 is an equidigital number, since it uses as much as digits as its factorization.

1317172154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658586079.

The product of its digits is 5880, while the sum is 32.

The square root of 1317172154 is about 36292.8664340528. The cubic root of 1317172154 is about 1096.1774075908.

Adding to 1317172154 its reverse (4512717131), we get a palindrome (5829889285).

The spelling of 1317172154 in words is "one billion, three hundred seventeen million, one hundred seventy-two thousand, one hundred fifty-four".