342443721 has 16 divisors (see below), whose sum is σ = 465429888. Its totient is φ = 223910400.

The previous prime is 342443719. The next prime is 342443771. The reversal of 342443721 is 127344243.

It is not a de Polignac number, because 342443721 - 2¹ = 342443719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (342443771) 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 15 ways as a sum of consecutive naturals, for example, 37881 + ... + 46041.

It is an arithmetic number, because the mean of its divisors is an integer number (29089368).

Almost surely, 2^342443721 is an apocalyptic number.

It is an amenable number.

342443721 is a deficient number, since it is larger than the sum of its proper divisors (122986167).

342443721 is a wasteful number, since it uses less digits than its factorization.

342443721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8432.

The product of its digits is 16128, while the sum is 30.

The square root of 342443721 is about 18505.2349620317. The cubic root of 342443721 is about 699.6213741520.

Adding to 342443721 its reverse (127344243), we get a palindrome (469787964).

The spelling of 342443721 in words is "three hundred forty-two million, four hundred forty-three thousand, seven hundred twenty-one".