242105278 has 4 divisors (see below), whose sum is σ = 363157920. Its totient is φ = 121052638.

The previous prime is 242105267. The next prime is 242105293. The reversal of 242105278 is 872501242.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×242105278² = 117229931270914568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60526318 + ... + 60526321.

It is an arithmetic number, because the mean of its divisors is an integer number (90789480).

Almost surely, 2^242105278 is an apocalyptic number.

242105278 is a deficient number, since it is larger than the sum of its proper divisors (121052642).

242105278 is a wasteful number, since it uses less digits than its factorization.

242105278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121052641.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 242105278 is about 15559.7325812496. The cubic root of 242105278 is about 623.2583215583.

The spelling of 242105278 in words is "two hundred forty-two million, one hundred five thousand, two hundred seventy-eight".