421916342 has 4 divisors (see below), whose sum is σ = 632874516. Its totient is φ = 210958170.

The previous prime is 421916329. The next prime is 421916351. The reversal of 421916342 is 243619124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421916299 and 421916308.

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 as a sum of consecutive naturals, namely, 105479084 + ... + 105479087.

It is an arithmetic number, because the mean of its divisors is an integer number (158218629).

Almost surely, 2^421916342 is an apocalyptic number.

421916342 is a deficient number, since it is larger than the sum of its proper divisors (210958174).

421916342 is a wasteful number, since it uses less digits than its factorization.

421916342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210958173.

The product of its digits is 10368, while the sum is 32.

The square root of 421916342 is about 20540.6022793880. The cubic root of 421916342 is about 750.0244981627.

The spelling of 421916342 in words is "four hundred twenty-one million, nine hundred sixteen thousand, three hundred forty-two".