117378261 has 128 divisors (see below), whose sum is σ = 241274880. Its totient is φ = 54432000.

The previous prime is 117378259. The next prime is 117378263. The reversal of 117378261 is 162873711.

It is an interprime number because it is at equal distance from previous prime (117378259) and next prime (117378263).

It is not a de Polignac number, because 117378261 - 2¹ = 117378259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117378263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1162111 + ... + 1162211.

It is an arithmetic number, because the mean of its divisors is an integer number (1884960).

Almost surely, 2^117378261 is an apocalyptic number.

117378261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117378261 is an abundant number, since it is smaller than the sum of its proper divisors (123896619).

117378261 is a wasteful number, since it uses less digits than its factorization.

117378261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 117378261 is about 10834.1248377522. The cubic root of 117378261 is about 489.6238415317.

The spelling of 117378261 in words is "one hundred seventeen million, three hundred seventy-eight thousand, two hundred sixty-one".