242140598261 has 2 divisors, whose sum is σ = 242140598262. Its totient is φ = 242140598260.

The previous prime is 242140598257. The next prime is 242140598263. The reversal of 242140598261 is 162895041242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180938786161 + 61201812100 = 425369^2 + 247390^2 .

It is a cyclic number.

It is not a de Polignac number, because 242140598261 - 2² = 242140598257 is a prime.

It is a super-3 number, since 3×242140598261³ (a number of 35 digits) contains 333 as substring.

Together with 242140598263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242140598263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121070299130 + 121070299131.

It is an arithmetic number, because the mean of its divisors is an integer number (121070299131).

Almost surely, 2^242140598261 is an apocalyptic number.

It is an amenable number.

242140598261 is a deficient number, since it is larger than the sum of its proper divisors (1).

242140598261 is an equidigital number, since it uses as much as digits as its factorization.

242140598261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 242140598261 in words is "two hundred forty-two billion, one hundred forty million, five hundred ninety-eight thousand, two hundred sixty-one".