242540917 has 8 divisors (see below), whose sum is σ = 248601600. Its totient is φ = 236545344.

The previous prime is 242540863. The next prime is 242540929. The reversal of 242540917 is 719045242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242540917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242540117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8692 + ... + 23677.

It is an arithmetic number, because the mean of its divisors is an integer number (31075200).

Almost surely, 2^242540917 is an apocalyptic number.

It is an amenable number.

242540917 is a deficient number, since it is larger than the sum of its proper divisors (6060683).

242540917 is a wasteful number, since it uses less digits than its factorization.

242540917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32555.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 242540917 is about 15573.7252126779. The cubic root of 242540917 is about 623.6319234113.

The spelling of 242540917 in words is "two hundred forty-two million, five hundred forty thousand, nine hundred seventeen".