242521369 has 2 divisors, whose sum is σ = 242521370. Its totient is φ = 242521368.

The previous prime is 242521319. The next prime is 242521379. The reversal of 242521369 is 963125242.

242521369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212139225 + 30382144 = 14565^2 + 5512^2 .

It is a cyclic number.

It is not a de Polignac number, because 242521369 - 2¹⁵ = 242488601 is a prime.

It is a super-2 number, since 2×242521369² = 117633228843268322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242521309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121260684 + 121260685.

It is an arithmetic number, because the mean of its divisors is an integer number (121260685).

Almost surely, 2^242521369 is an apocalyptic number.

It is an amenable number.

242521369 is a deficient number, since it is larger than the sum of its proper divisors (1).

242521369 is an equidigital number, since it uses as much as digits as its factorization.

242521369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 242521369 is about 15573.0976045230. The cubic root of 242521369 is about 623.6151687340.

The spelling of 242521369 in words is "two hundred forty-two million, five hundred twenty-one thousand, three hundred sixty-nine".