342021161 has 2 divisors, whose sum is σ = 342021162. Its totient is φ = 342021160.

The previous prime is 342021149. The next prime is 342021179. The reversal of 342021161 is 161120243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319515625 + 22505536 = 17875^2 + 4744^2 .

It is a cyclic number.

It is not a de Polignac number, because 342021161 - 2¹⁰ = 342020137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342021461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171010580 + 171010581.

It is an arithmetic number, because the mean of its divisors is an integer number (171010581).

Almost surely, 2^342021161 is an apocalyptic number.

It is an amenable number.

342021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

342021161 is an equidigital number, since it uses as much as digits as its factorization.

342021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 342021161 is about 18493.8141279726. The cubic root of 342021161 is about 699.3334887060. Note that the first 3 decimals are identical.

The spelling of 342021161 in words is "three hundred forty-two million, twenty-one thousand, one hundred sixty-one".