242672539 has 4 divisors (see below), whose sum is σ = 242804800. Its totient is φ = 242540280.

The previous prime is 242672537. The next prime is 242672597. The reversal of 242672539 is 935276242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935276242 = 2 ⋅467638121.

It is a cyclic number.

It is not a de Polignac number, because 242672539 - 2¹ = 242672537 is a prime.

It is a super-2 number, since 2×242672539² = 117779922369413042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242672537) 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, 63339 + ... + 67060.

It is an arithmetic number, because the mean of its divisors is an integer number (60701200).

Almost surely, 2^242672539 is an apocalyptic number.

242672539 is a deficient number, since it is larger than the sum of its proper divisors (132261).

242672539 is a wasteful number, since it uses less digits than its factorization.

242672539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132260.

The product of its digits is 181440, while the sum is 40.

The square root of 242672539 is about 15577.9504107569. The cubic root of 242672539 is about 623.7447137783.

The spelling of 242672539 in words is "two hundred forty-two million, six hundred seventy-two thousand, five hundred thirty-nine".