118171745 has 4 divisors (see below), whose sum is σ = 141806100. Its totient is φ = 94537392.

The previous prime is 118171741. The next prime is 118171759. The reversal of 118171745 is 547171811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547171811 = 1619 ⋅337969.

It can be written as a sum of positive squares in 2 ways, for example, as 52432081 + 65739664 = 7241^2 + 8108^2 .

It is a cyclic number.

It is not a de Polignac number, because 118171745 - 2² = 118171741 is a prime.

It is a super-2 number, since 2×118171745² = 27929122632690050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118171741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11817170 + ... + 11817179.

It is an arithmetic number, because the mean of its divisors is an integer number (35451525).

Almost surely, 2^118171745 is an apocalyptic number.

It is an amenable number.

118171745 is a deficient number, since it is larger than the sum of its proper divisors (23634355).

118171745 is an equidigital number, since it uses as much as digits as its factorization.

118171745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23634354.

The product of its digits is 7840, while the sum is 35.

The square root of 118171745 is about 10870.6828212399. The cubic root of 118171745 is about 490.7246601069.

The spelling of 118171745 in words is "one hundred eighteen million, one hundred seventy-one thousand, seven hundred forty-five".