242090321 has 8 divisors (see below), whose sum is σ = 266179584. Its totient is φ = 218347920.

The previous prime is 242090311. The next prime is 242090339. The reversal of 242090321 is 123090242.

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

It is a cyclic number.

It is not a de Polignac number, because 242090321 - 2¹⁸ = 241828177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242090311) 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, 85250 + ... + 88043.

It is an arithmetic number, because the mean of its divisors is an integer number (33272448).

Almost surely, 2^242090321 is an apocalyptic number.

It is an amenable number.

242090321 is a deficient number, since it is larger than the sum of its proper divisors (24089263).

242090321 is a wasteful number, since it uses less digits than its factorization.

242090321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173431.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 242090321 is about 15559.2519421725. The cubic root of 242090321 is about 623.2454865543.

The spelling of 242090321 in words is "two hundred forty-two million, ninety thousand, three hundred twenty-one".