242135887 has 4 divisors (see below), whose sum is σ = 276726736. Its totient is φ = 207545040.

The previous prime is 242135849. The next prime is 242135893. The reversal of 242135887 is 788531242.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788531242 = 2 ⋅394265621.

It is a cyclic number.

It is not a de Polignac number, because 242135887 - 2⁷ = 242135759 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 (242135897) 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, 17295414 + ... + 17295427.

It is an arithmetic number, because the mean of its divisors is an integer number (69181684).

Almost surely, 2^242135887 is an apocalyptic number.

242135887 is a deficient number, since it is larger than the sum of its proper divisors (34590849).

242135887 is an equidigital number, since it uses as much as digits as its factorization.

242135887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34590848.

The product of its digits is 107520, while the sum is 40.

The square root of 242135887 is about 15560.7161467588. The cubic root of 242135887 is about 623.2845863169.

The spelling of 242135887 in words is "two hundred forty-two million, one hundred thirty-five thousand, eight hundred eighty-seven".