242355421 has 24 divisors (see below), whose sum is σ = 312806880. Its totient is φ = 185623200.

The previous prime is 242355413. The next prime is 242355433. The reversal of 242355421 is 124553242.

It is not a de Polignac number, because 242355421 - 2³ = 242355413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242355421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242355521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27991 + ... + 35611.

It is an arithmetic number, because the mean of its divisors is an integer number (13033620).

Almost surely, 2^242355421 is an apocalyptic number.

It is an amenable number.

242355421 is a deficient number, since it is larger than the sum of its proper divisors (70451459).

242355421 is a wasteful number, since it uses less digits than its factorization.

242355421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7705 (or 7698 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 242355421 is about 15567.7686583531. The cubic root of 242355421 is about 623.4728976926.

The spelling of 242355421 in words is "two hundred forty-two million, three hundred fifty-five thousand, four hundred twenty-one".