342131021 has 4 divisors (see below), whose sum is σ = 342170844. Its totient is φ = 342091200.

The previous prime is 342131017. The next prime is 342131033. The reversal of 342131021 is 120131243.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 280194121 + 61936900 = 16739^2 + 7870^2 .

It is a cyclic number.

It is not a de Polignac number, because 342131021 - 2² = 342131017 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 (342131051) 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 in 3 ways as a sum of consecutive naturals, for example, 1100 + ... + 26181.

It is an arithmetic number, because the mean of its divisors is an integer number (85542711).

Almost surely, 2^342131021 is an apocalyptic number.

It is an amenable number.

342131021 is a deficient number, since it is larger than the sum of its proper divisors (39823).

342131021 is a wasteful number, since it uses less digits than its factorization.

342131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39822.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 342131021 is about 18496.7840718326. The cubic root of 342131021 is about 699.4083579063.

Adding to 342131021 its reverse (120131243), we get a palindrome (462262264).

The spelling of 342131021 in words is "three hundred forty-two million, one hundred thirty-one thousand, twenty-one".