242806665 has 16 divisors (see below), whose sum is σ = 411343488. Its totient is φ = 121879296.

The previous prime is 242806609. The next prime is 242806673. The reversal of 242806665 is 566608242.

It is not a de Polignac number, because 242806665 - 2⁹ = 242806153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475837 + ... + 476346.

It is an arithmetic number, because the mean of its divisors is an integer number (25708968).

Almost surely, 2^242806665 is an apocalyptic number.

It is an amenable number.

242806665 is a deficient number, since it is larger than the sum of its proper divisors (168536823).

242806665 is a wasteful number, since it uses less digits than its factorization.

242806665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952208.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 242806665 is about 15582.2548111626. The cubic root of 242806665 is about 623.8596079417.

The spelling of 242806665 in words is "two hundred forty-two million, eight hundred six thousand, six hundred sixty-five".