242142340261 has 2 divisors, whose sum is σ = 242142340262. Its totient is φ = 242142340260.

The previous prime is 242142340247. The next prime is 242142340291. The reversal of 242142340261 is 162043241242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227046532036 + 15095808225 = 476494^2 + 122865^2 .

It is a cyclic number.

It is not a de Polignac number, because 242142340261 - 2⁵ = 242142340229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242142340291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121071170130 + 121071170131.

It is an arithmetic number, because the mean of its divisors is an integer number (121071170131).

Almost surely, 2^242142340261 is an apocalyptic number.

It is an amenable number.

242142340261 is a deficient number, since it is larger than the sum of its proper divisors (1).

242142340261 is an equidigital number, since it uses as much as digits as its factorization.

242142340261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

The spelling of 242142340261 in words is "two hundred forty-two billion, one hundred forty-two million, three hundred forty thousand, two hundred sixty-one".