117279261 has 24 divisors (see below), whose sum is σ = 186174144. Its totient is φ = 70551360.

The previous prime is 117279259. The next prime is 117279299. The reversal of 117279261 is 162972711.

It is a happy number.

It is not a de Polignac number, because 117279261 - 2¹ = 117279259 is a prime.

It is a super-2 number, since 2×117279261² = 27508850121412242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117279061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9240 + ... + 17886.

It is an arithmetic number, because the mean of its divisors is an integer number (7757256).

Almost surely, 2^117279261 is an apocalyptic number.

117279261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117279261 is a deficient number, since it is larger than the sum of its proper divisors (68894883).

117279261 is a wasteful number, since it uses less digits than its factorization.

117279261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8801 (or 8798 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 117279261 is about 10829.5549770062. The cubic root of 117279261 is about 489.4861488163.

It can be divided in two parts, 117 and 279261, that added together give a triangular number (279378 = T₇₄₇).

The spelling of 117279261 in words is "one hundred seventeen million, two hundred seventy-nine thousand, two hundred sixty-one".