421244342 has 8 divisors (see below), whose sum is σ = 634023936. Its totient is φ = 209903032.

The previous prime is 421244311. The next prime is 421244347. The reversal of 421244342 is 243442124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421244347) 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, 358838 + ... + 360009.

It is an arithmetic number, because the mean of its divisors is an integer number (79252992).

Almost surely, 2^421244342 is an apocalyptic number.

421244342 is a deficient number, since it is larger than the sum of its proper divisors (212779594).

421244342 is a wasteful number, since it uses less digits than its factorization.

421244342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719142.

The product of its digits is 6144, while the sum is 26.

The square root of 421244342 is about 20524.2379152065. The cubic root of 421244342 is about 749.6260903605.

Adding to 421244342 its reverse (243442124), we get a palindrome (664686466).

The spelling of 421244342 in words is "four hundred twenty-one million, two hundred forty-four thousand, three hundred forty-two".