342421405 has 4 divisors (see below), whose sum is σ = 410905692. Its totient is φ = 273937120.

The previous prime is 342421379. The next prime is 342421441. The reversal of 342421405 is 504124243.

It is a happy number.

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 179935396 + 162486009 = 13414^2 + 12747^2 .

It is a de Polignac number, because none of the positive numbers 2^k-342421405 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 342421405.

It is a congruent number.

It is an unprimeable number.

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, 34242136 + ... + 34242145.

It is an arithmetic number, because the mean of its divisors is an integer number (102726423).

Almost surely, 2^342421405 is an apocalyptic number.

It is an amenable number.

342421405 is a deficient number, since it is larger than the sum of its proper divisors (68484287).

342421405 is an equidigital number, since it uses as much as digits as its factorization.

342421405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68484286.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 342421405 is about 18504.6319876943. The cubic root of 342421405 is about 699.6061764336.

Adding to 342421405 its reverse (504124243), we get a palindrome (846545648).

The spelling of 342421405 in words is "three hundred forty-two million, four hundred twenty-one thousand, four hundred five".