242152421 has 4 divisors (see below), whose sum is σ = 276745632. Its totient is φ = 207559212.

The previous prime is 242152411. The next prime is 242152447. The reversal of 242152421 is 124251242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242152421 - 2¹⁰ = 242151397 is a prime.

It is a super-2 number, since 2×242152421² = 117275589992322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242152411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17296595 + ... + 17296608.

It is an arithmetic number, because the mean of its divisors is an integer number (69186408).

Almost surely, 2^242152421 is an apocalyptic number.

It is an amenable number.

242152421 is a deficient number, since it is larger than the sum of its proper divisors (34593211).

242152421 is an equidigital number, since it uses as much as digits as its factorization.

242152421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34593210.

The product of its digits is 1280, while the sum is 23.

The square root of 242152421 is about 15561.2474114385. The cubic root of 242152421 is about 623.2987727763.

The spelling of 242152421 in words is "two hundred forty-two million, one hundred fifty-two thousand, four hundred twenty-one".