242154321 has 16 divisors (see below), whose sum is σ = 336236160. Its totient is φ = 154828800.

The previous prime is 242154317. The next prime is 242154343. The reversal of 242154321 is 123451242.

It is not a de Polignac number, because 242154321 - 2² = 242154317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242154291 and 242154300.

It is not an unprimeable number, because it can be changed into a prime (242154301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3921 + ... + 22353.

It is an arithmetic number, because the mean of its divisors is an integer number (21014760).

Almost surely, 2^242154321 is an apocalyptic number.

It is an amenable number.

242154321 is a deficient number, since it is larger than the sum of its proper divisors (94081839).

242154321 is a wasteful number, since it uses less digits than its factorization.

242154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18616.

The product of its digits is 1920, while the sum is 24.

The square root of 242154321 is about 15561.3084604091. The cubic root of 242154321 is about 623.3004029680.

The spelling of 242154321 in words is "two hundred forty-two million, one hundred fifty-four thousand, three hundred twenty-one".