242472421 has 4 divisors (see below), whose sum is σ = 250294144. Its totient is φ = 234650700.

The previous prime is 242472407. The next prime is 242472427. The reversal of 242472421 is 124274242.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242472421 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 242472421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242472427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3910815 + ... + 3910876.

It is an arithmetic number, because the mean of its divisors is an integer number (62573536).

Almost surely, 2^242472421 is an apocalyptic number.

It is an amenable number.

242472421 is a deficient number, since it is larger than the sum of its proper divisors (7821723).

242472421 is an equidigital number, since it uses as much as digits as its factorization.

242472421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7821722.

The product of its digits is 7168, while the sum is 28.

The square root of 242472421 is about 15571.5259688959. The cubic root of 242472421 is about 623.5732112367.

The spelling of 242472421 in words is "two hundred forty-two million, four hundred seventy-two thousand, four hundred twenty-one".