242135647 has 4 divisors (see below), whose sum is σ = 260761480. Its totient is φ = 223509816.

The previous prime is 242135629. The next prime is 242135701. The reversal of 242135647 is 746531242.

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

It is a cyclic number.

It is not a de Polignac number, because 242135647 - 2¹⁵ = 242102879 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 (242135617) 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, 9312897 + ... + 9312922.

It is an arithmetic number, because the mean of its divisors is an integer number (65190370).

Almost surely, 2^242135647 is an apocalyptic number.

242135647 is a deficient number, since it is larger than the sum of its proper divisors (18625833).

242135647 is a wasteful number, since it uses less digits than its factorization.

242135647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18625832.

The product of its digits is 40320, while the sum is 34.

The square root of 242135647 is about 15560.7084350296. The cubic root of 242135647 is about 623.2843803880.

Adding to 242135647 its reverse (746531242), we get a palindrome (988666889).

The spelling of 242135647 in words is "two hundred forty-two million, one hundred thirty-five thousand, six hundred forty-seven".