242479281 has 12 divisors (see below), whose sum is σ = 355369616. Its totient is φ = 146956920.

The previous prime is 242479277. The next prime is 242479319. The reversal of 242479281 is 182974242.

It is a happy number.

It is not a de Polignac number, because 242479281 - 2² = 242479277 is a prime.

It is a super-2 number, since 2×242479281² = 117592403428553922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242479261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333631 + ... + 334356.

Almost surely, 2^242479281 is an apocalyptic number.

It is an amenable number.

242479281 is a deficient number, since it is larger than the sum of its proper divisors (112890335).

242479281 is a wasteful number, since it uses less digits than its factorization.

242479281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668012 (or 668001 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 242479281 is about 15571.7462411895. The cubic root of 242479281 is about 623.5790918668.

The spelling of 242479281 in words is "two hundred forty-two million, four hundred seventy-nine thousand, two hundred eighty-one".