242821859 has 8 divisors (see below), whose sum is σ = 277673568. Its totient is φ = 208010880.

The previous prime is 242821847. The next prime is 242821921. The reversal of 242821859 is 958128242.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242821859 - 2¹² = 242817763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242821759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3899 + ... + 22379.

It is an arithmetic number, because the mean of its divisors is an integer number (34709196).

Almost surely, 2^242821859 is an apocalyptic number.

242821859 is a deficient number, since it is larger than the sum of its proper divisors (34851709).

242821859 is a wasteful number, since it uses less digits than its factorization.

242821859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20365.

The product of its digits is 92160, while the sum is 41.

The square root of 242821859 is about 15582.7423452998. The cubic root of 242821859 is about 623.8726206614.

The spelling of 242821859 in words is "two hundred forty-two million, eight hundred twenty-one thousand, eight hundred fifty-nine".