242272021 has 4 divisors (see below), whose sum is σ = 255023200. Its totient is φ = 229520844.

The previous prime is 242272007. The next prime is 242272027. The reversal of 242272021 is 120272242.

It is a happy number.

242272021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 242272021 - 2⁵ = 242271989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242271983 and 242272001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242272027) 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, 6375561 + ... + 6375598.

It is an arithmetic number, because the mean of its divisors is an integer number (63755800).

Almost surely, 2^242272021 is an apocalyptic number.

It is an amenable number.

242272021 is a deficient number, since it is larger than the sum of its proper divisors (12751179).

242272021 is a wasteful number, since it uses less digits than its factorization.

242272021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12751178.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 242272021 is about 15565.0898166377. The cubic root of 242272021 is about 623.4013724301.

The spelling of 242272021 in words is "two hundred forty-two million, two hundred seventy-two thousand, twenty-one".