242863421 has 2 divisors, whose sum is σ = 242863422. Its totient is φ = 242863420.

The previous prime is 242863367. The next prime is 242863427. The reversal of 242863421 is 124368242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219928900 + 22934521 = 14830^2 + 4789^2 .

It is a cyclic number.

It is not a de Polignac number, because 242863421 - 2¹⁰ = 242862397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242863427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121431710 + 121431711.

It is an arithmetic number, because the mean of its divisors is an integer number (121431711).

Almost surely, 2^242863421 is an apocalyptic number.

It is an amenable number.

242863421 is a deficient number, since it is larger than the sum of its proper divisors (1).

242863421 is an equidigital number, since it uses as much as digits as its factorization.

242863421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 32.

The square root of 242863421 is about 15584.0758789220. The cubic root of 242863421 is about 623.9082131663.

The spelling of 242863421 in words is "two hundred forty-two million, eight hundred sixty-three thousand, four hundred twenty-one".