118305042025 has 9 divisors (see below), whose sum is σ = 146700384663. Its totient is φ = 94642657800.

The previous prime is 118305042007. The next prime is 118305042029. The reversal of 118305042025 is 520240503811.

The square root of 118305042025 is 343955.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42589815129 + 75715226896 = 206373^2 + 275164^2 .

It is not a de Polignac number, because 118305042025 - 2²³ = 118296653417 is a prime.

It is a super-2 number, since 2×118305042025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118305042029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1685380 + ... + 1754170.

Almost surely, 2^118305042025 is an apocalyptic number.

118305042025 is the 343955-th square number.

118305042025 is the 171978-th centered octagonal number.

It is an amenable number.

118305042025 is a deficient number, since it is larger than the sum of its proper divisors (28395342638).

118305042025 is an frugal number, since it uses more digits than its factorization.

118305042025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137592 (or 68796 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 118305042025 its reverse (520240503811), we get a palindrome (638545545836).

The spelling of 118305042025 in words is "one hundred eighteen billion, three hundred five million, forty-two thousand, twenty-five".