181812126 has 16 divisors (see below), whose sum is σ = 363769344. Its totient is φ = 60579864.

The previous prime is 181812119. The next prime is 181812131. The reversal of 181812126 is 621218181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 181812093 and 181812102.

It is a congruent 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, 17011 + ... + 25553.

It is an arithmetic number, because the mean of its divisors is an integer number (22735584).

Almost surely, 2^181812126 is an apocalyptic number.

181812126 is an abundant number, since it is smaller than the sum of its proper divisors (181957218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181812126 is a wasteful number, since it uses less digits than its factorization.

181812126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12095.

The product of its digits is 1536, while the sum is 30.

The square root of 181812126 is about 13483.7726916468. The cubic root of 181812126 is about 566.5100452197.

The spelling of 181812126 in words is "one hundred eighty-one million, eight hundred twelve thousand, one hundred twenty-six".