342421421 has 4 divisors (see below), whose sum is σ = 351676092. Its totient is φ = 333166752.

The previous prime is 342421379. The next prime is 342421441. The reversal of 342421421 is 124124243.

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

It can be written as a sum of positive squares in 2 ways, for example, as 319515625 + 22905796 = 17875^2 + 4786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342421421 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 (342421441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4627280 + ... + 4627353.

It is an arithmetic number, because the mean of its divisors is an integer number (87919023).

Almost surely, 2^342421421 is an apocalyptic number.

It is an amenable number.

342421421 is a deficient number, since it is larger than the sum of its proper divisors (9254671).

342421421 is an equidigital number, since it uses as much as digits as its factorization.

342421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9254670.

The product of its digits is 1536, while the sum is 23.

The square root of 342421421 is about 18504.6324200185. The cubic root of 342421421 is about 699.6061873302.

Adding to 342421421 its reverse (124124243), we get a palindrome (466545664).

The spelling of 342421421 in words is "three hundred forty-two million, four hundred twenty-one thousand, four hundred twenty-one".