342120281 has 2 divisors, whose sum is σ = 342120282. Its totient is φ = 342120280.

The previous prime is 342120271. The next prime is 342120313. The reversal of 342120281 is 182021243.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298771225 + 43349056 = 17285^2 + 6584^2 .

It is a cyclic number.

It is not a de Polignac number, because 342120281 - 2⁶ = 342120217 is a prime.

It is a super-2 number, since 2×342120281² = 234092573343037922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (342120271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171060140 + 171060141.

It is an arithmetic number, because the mean of its divisors is an integer number (171060141).

Almost surely, 2^342120281 is an apocalyptic number.

It is an amenable number.

342120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

342120281 is an equidigital number, since it uses as much as digits as its factorization.

342120281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 342120281 is about 18496.4937488163. The cubic root of 342120281 is about 699.4010393413.

The spelling of 342120281 in words is "three hundred forty-two million, one hundred twenty thousand, two hundred eighty-one".