242566539 has 16 divisors (see below), whose sum is σ = 327462912. Its totient is φ = 159700448.

The previous prime is 242566507. The next prime is 242566553. The reversal of 242566539 is 935665242.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 242566539 - 2⁵ = 242566507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242566539.

It is not an unprimeable number, because it can be changed into a prime (242566739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121957 + ... + 123929.

It is an arithmetic number, because the mean of its divisors is an integer number (20466432).

Almost surely, 2^242566539 is an apocalyptic number.

242566539 is a deficient number, since it is larger than the sum of its proper divisors (84896373).

242566539 is a wasteful number, since it uses less digits than its factorization.

242566539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466.

The product of its digits is 388800, while the sum is 42.

The square root of 242566539 is about 15574.5477943984. The cubic root of 242566539 is about 623.6538827776.

The spelling of 242566539 in words is "two hundred forty-two million, five hundred sixty-six thousand, five hundred thirty-nine".