342021143 has 4 divisors (see below), whose sum is σ = 342311928. Its totient is φ = 341730360.

The previous prime is 342021103. The next prime is 342021149. The reversal of 342021143 is 341120243.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 342021143 - 2²⁴ = 325243927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342021149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143621 + ... + 145982.

It is an arithmetic number, because the mean of its divisors is an integer number (85577982).

Almost surely, 2^342021143 is an apocalyptic number.

342021143 is a deficient number, since it is larger than the sum of its proper divisors (290785).

342021143 is a wasteful number, since it uses less digits than its factorization.

342021143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290784.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 342021143 is about 18493.8136413234. The cubic root of 342021143 is about 699.3334764377. Note that the first 3 decimals are identical.

Adding to 342021143 its reverse (341120243), we get a palindrome (683141386).

The spelling of 342021143 in words is "three hundred forty-two million, twenty-one thousand, one hundred forty-three".