117243145 has 8 divisors (see below), whose sum is σ = 143685504. Its totient is φ = 91798704.

The previous prime is 117243127. The next prime is 117243151. The reversal of 117243145 is 541342711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117243145 - 2⁹ = 117242633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 249219 + ... + 249688.

It is an arithmetic number, because the mean of its divisors is an integer number (17960688).

Almost surely, 2^117243145 is an apocalyptic number.

It is an amenable number.

117243145 is a deficient number, since it is larger than the sum of its proper divisors (26442359).

117243145 is an equidigital number, since it uses as much as digits as its factorization.

117243145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498959.

The product of its digits is 3360, while the sum is 28.

The square root of 117243145 is about 10827.8873747375. The cubic root of 117243145 is about 489.4358981111.

Adding to 117243145 its reverse (541342711), we get a palindrome (658585856).

The spelling of 117243145 in words is "one hundred seventeen million, two hundred forty-three thousand, one hundred forty-five".