242542186 has 8 divisors (see below), whose sum is σ = 364012740. Its totient is φ = 121204608.

The previous prime is 242542147. The next prime is 242542189. The reversal of 242542186 is 681245242.

It can be written as a sum of positive squares in 2 ways, for example, as 231192025 + 11350161 = 15205^2 + 3369^2 .

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

It is not an unprimeable number, because it can be changed into a prime (242542189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28551 + ... + 36058.

Almost surely, 2^242542186 is an apocalyptic number.

242542186 is a deficient number, since it is larger than the sum of its proper divisors (121470554).

242542186 is a wasteful number, since it uses less digits than its factorization.

242542186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66488.

The product of its digits is 30720, while the sum is 34.

The square root of 242542186 is about 15573.7659543220. The cubic root of 242542186 is about 623.6330110457.

The spelling of 242542186 in words is "two hundred forty-two million, five hundred forty-two thousand, one hundred eighty-six".