242504281 has 2 divisors, whose sum is σ = 242504282. Its totient is φ = 242504280.

The previous prime is 242504279. The next prime is 242504291. The reversal of 242504281 is 182405242.

242504281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241025625 + 1478656 = 15525^2 + 1216^2 .

It is a cyclic number.

It is not a de Polignac number, because 242504281 - 2¹ = 242504279 is a prime.

It is a super-2 number, since 2×242504281² = 117616652606653922, which contains 22 as substring.

Together with 242504279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242504231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121252140 + 121252141.

It is an arithmetic number, because the mean of its divisors is an integer number (121252141).

Almost surely, 2^242504281 is an apocalyptic number.

It is an amenable number.

242504281 is a deficient number, since it is larger than the sum of its proper divisors (1).

242504281 is an equidigital number, since it uses as much as digits as its factorization.

242504281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 242504281 is about 15572.5489564169. The cubic root of 242504281 is about 623.6005217961.

The spelling of 242504281 in words is "two hundred forty-two million, five hundred four thousand, two hundred eighty-one".