242126721 has 12 divisors (see below), whose sum is σ = 350073360. Its totient is φ = 161263320.

The previous prime is 242126711. The next prime is 242126743. The reversal of 242126721 is 127621242.

It is not a de Polignac number, because 242126721 - 2¹³ = 242118529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242126701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2511 + ... + 22148.

It is an arithmetic number, because the mean of its divisors is an integer number (29172780).

Almost surely, 2^242126721 is an apocalyptic number.

It is an amenable number.

242126721 is a deficient number, since it is larger than the sum of its proper divisors (107946639).

242126721 is a wasteful number, since it uses less digits than its factorization.

242126721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25756 (or 25753 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 242126721 is about 15560.4216202518. The cubic root of 242126721 is about 623.2767214514.

Adding to 242126721 its reverse (127621242), we get a palindrome (369747963).

The spelling of 242126721 in words is "two hundred forty-two million, one hundred twenty-six thousand, seven hundred twenty-one".