181187242 has 8 divisors (see below), whose sum is σ = 273189636. Its totient is φ = 90124032.

The previous prime is 181187183. The next prime is 181187267. The reversal of 181187242 is 242781181.

181187242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148571721 + 32615521 = 12189^2 + 5711^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 181187198 and 181187207.

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, 234313 + ... + 235084.

Almost surely, 2^181187242 is an apocalyptic number.

181187242 is a deficient number, since it is larger than the sum of its proper divisors (92002394).

181187242 is a wasteful number, since it uses less digits than its factorization.

181187242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469592.

The product of its digits is 7168, while the sum is 34.

The square root of 181187242 is about 13460.5810424365. The cubic root of 181187242 is about 565.8602730000.

The spelling of 181187242 in words is "one hundred eighty-one million, one hundred eighty-seven thousand, two hundred forty-two".