242105420 has 12 divisors (see below), whose sum is σ = 508421424. Its totient is φ = 96842160.

The previous prime is 242105417. The next prime is 242105453. The reversal of 242105420 is 24501242.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 12105271 = 242105420 / (2 + 4 + 2 + 1 + 0 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 242105392 and 242105401.

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, 6052616 + ... + 6052655.

It is an arithmetic number, because the mean of its divisors is an integer number (42368452).

Almost surely, 2^242105420 is an apocalyptic number.

242105420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242105420 is an abundant number, since it is smaller than the sum of its proper divisors (266316004).

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

242105420 is a wasteful number, since it uses less digits than its factorization.

242105420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12105280 (or 12105278 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 242105420 is about 15559.7371443093. The cubic root of 242105420 is about 623.2584434098.

Adding to 242105420 its reverse (24501242), we get a palindrome (266606662).

The spelling of 242105420 in words is "two hundred forty-two million, one hundred five thousand, four hundred twenty".