117315261 has 60 divisors (see below), whose sum is σ = 203184540. Its totient is φ = 65197440.

The previous prime is 117315259. The next prime is 117315277. The reversal of 117315261 is 162513711.

It can be written as a sum of positive squares in 2 ways, for example, as 11431161 + 105884100 = 3381^2 + 10290^2 .

It is not a de Polignac number, because 117315261 - 2¹ = 117315259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117315221) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1318105 + ... + 1318193.

It is an arithmetic number, because the mean of its divisors is an integer number (3386409).

Almost surely, 2^117315261 is an apocalyptic number.

It is an amenable number.

117315261 is a deficient number, since it is larger than the sum of its proper divisors (85869279).

117315261 is an frugal number, since it uses more digits than its factorization.

117315261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 160 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 117315261 is about 10831.2169676357. The cubic root of 117315261 is about 489.5362278570.

Adding to 117315261 its reverse (162513711), we get a palindrome (279828972).

The spelling of 117315261 in words is "one hundred seventeen million, three hundred fifteen thousand, two hundred sixty-one".