242721043 has 2 divisors, whose sum is σ = 242721044. Its totient is φ = 242721042.

The previous prime is 242721007. The next prime is 242721049. The reversal of 242721043 is 340127242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242721043 - 2⁹ = 242720531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242720999 and 242721017.

It is not a weakly prime, because it can be changed into another prime (242721049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121360521 + 121360522.

It is an arithmetic number, because the mean of its divisors is an integer number (121360522).

Almost surely, 2^242721043 is an apocalyptic number.

242721043 is a deficient number, since it is larger than the sum of its proper divisors (1).

242721043 is an equidigital number, since it uses as much as digits as its factorization.

242721043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 242721043 is about 15579.5071488157. The cubic root of 242721043 is about 623.7862678526.

Adding to 242721043 its reverse (340127242), we get a palindrome (582848285).

The spelling of 242721043 in words is "two hundred forty-two million, seven hundred twenty-one thousand, forty-three".