342042121 has 2 divisors, whose sum is σ = 342042122. Its totient is φ = 342042120.

The previous prime is 342042101. The next prime is 342042137. The reversal of 342042121 is 121240243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254881225 + 87160896 = 15965^2 + 9336^2 .

It is a cyclic number.

It is not a de Polignac number, because 342042121 - 2⁵ = 342042089 is a prime.

It is not a weakly prime, because it can be changed into another prime (342042101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171021060 + 171021061.

It is an arithmetic number, because the mean of its divisors is an integer number (171021061).

Almost surely, 2^342042121 is an apocalyptic number.

It is an amenable number.

342042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

342042121 is an equidigital number, since it uses as much as digits as its factorization.

342042121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 342042121 is about 18494.3807952578. The cubic root of 342042121 is about 699.3477741091.

Adding to 342042121 its reverse (121240243), we get a palindrome (463282364).

The spelling of 342042121 in words is "three hundred forty-two million, forty-two thousand, one hundred twenty-one".