242120417 has 12 divisors (see below), whose sum is σ = 307255536. Its totient is φ = 188664840.

The previous prime is 242120413. The next prime is 242120503. The reversal of 242120417 is 714021242.

It is not a de Polignac number, because 242120417 - 2² = 242120413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242120392 and 242120401.

It is not an unprimeable number, because it can be changed into a prime (242120413) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 224063 + ... + 225140.

It is an arithmetic number, because the mean of its divisors is an integer number (25604628).

Almost surely, 2^242120417 is an apocalyptic number.

It is an amenable number.

242120417 is a deficient number, since it is larger than the sum of its proper divisors (65135119).

242120417 is a wasteful number, since it uses less digits than its factorization.

242120417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449228 (or 449221 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 242120417 is about 15560.2190537280. The cubic root of 242120417 is about 623.2713122032.

Adding to 242120417 its reverse (714021242), we get a palindrome (956141659).

The spelling of 242120417 in words is "two hundred forty-two million, one hundred twenty thousand, four hundred seventeen".