242686859 has 4 divisors (see below), whose sum is σ = 242831400. Its totient is φ = 242542320.

The previous prime is 242686837. The next prime is 242686889. The reversal of 242686859 is 958686242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958686242 = 2 ⋅479343121.

It is a cyclic number.

It is not a de Polignac number, because 242686859 - 2⁸ = 242686603 is a prime.

It is a super-3 number, since 3×242686859³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242686889) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 69722 + ... + 73119.

It is an arithmetic number, because the mean of its divisors is an integer number (60707850).

Almost surely, 2^242686859 is an apocalyptic number.

242686859 is a deficient number, since it is larger than the sum of its proper divisors (144541).

242686859 is a wasteful number, since it uses less digits than its factorization.

242686859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144540.

The product of its digits is 1658880, while the sum is 50.

The square root of 242686859 is about 15578.4100279842. The cubic root of 242686859 is about 623.7569825042.

The spelling of 242686859 in words is "two hundred forty-two million, six hundred eighty-six thousand, eight hundred fifty-nine".