421382906 has 16 divisors (see below), whose sum is σ = 729124416. Its totient is φ = 178904256.

The previous prime is 421382891. The next prime is 421382909. The reversal of 421382906 is 609283124.

It is not an unprimeable number, because it can be changed into a prime (421382909) 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 7 ways as a sum of consecutive naturals, for example, 139151 + ... + 142146.

It is an arithmetic number, because the mean of its divisors is an integer number (45570276).

Almost surely, 2^421382906 is an apocalyptic number.

421382906 is a deficient number, since it is larger than the sum of its proper divisors (307741510).

421382906 is a wasteful number, since it uses less digits than its factorization.

421382906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281413.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 421382906 is about 20527.6132562946. The cubic root of 421382906 is about 749.7082752844.

The spelling of 421382906 in words is "four hundred twenty-one million, three hundred eighty-two thousand, nine hundred six".