117117261 has 12 divisors (see below), whose sum is σ = 170291680. Its totient is φ = 77560200.

The previous prime is 117117223. The next prime is 117117289. The reversal of 117117261 is 162711711.

It is not a de Polignac number, because 117117261 - 2⁹ = 117116749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117117061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41731 + ... + 44448.

Almost surely, 2^117117261 is an apocalyptic number.

It is an amenable number.

117117261 is a deficient number, since it is larger than the sum of its proper divisors (53174419).

117117261 is a wasteful number, since it uses less digits than its factorization.

117117261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86336 (or 86333 counting only the distinct ones).

The product of its digits is 588, while the sum is 27.

The square root of 117117261 is about 10822.0728605938. The cubic root of 117117261 is about 489.2606662237.

Adding to 117117261 its reverse (162711711), we get a palindrome (279828972).

The spelling of 117117261 in words is "one hundred seventeen million, one hundred seventeen thousand, two hundred sixty-one".