117775145 has 4 divisors (see below), whose sum is σ = 141330180. Its totient is φ = 94220112.

The previous prime is 117775139. The next prime is 117775153. The reversal of 117775145 is 541577711.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57805609 + 59969536 = 7603^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 117775145 - 2¹⁰ = 117774121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117775099 and 117775108.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11777510 + ... + 11777519.

It is an arithmetic number, because the mean of its divisors is an integer number (35332545).

Almost surely, 2^117775145 is an apocalyptic number.

It is an amenable number.

117775145 is a deficient number, since it is larger than the sum of its proper divisors (23555035).

117775145 is an equidigital number, since it uses as much as digits as its factorization.

117775145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23555034.

The product of its digits is 34300, while the sum is 38.

The square root of 117775145 is about 10852.4257656987. The cubic root of 117775145 is about 490.1750658642.

The spelling of 117775145 in words is "one hundred seventeen million, seven hundred seventy-five thousand, one hundred forty-five".