421009946 has 16 divisors (see below), whose sum is σ = 745013760. Its totient is φ = 174612240.

The previous prime is 421009937. The next prime is 421009957. The reversal of 421009946 is 649900124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484601 + ... + 485468.

It is an arithmetic number, because the mean of its divisors is an integer number (46563360).

Almost surely, 2^421009946 is an apocalyptic number.

421009946 is a deficient number, since it is larger than the sum of its proper divisors (324003814).

421009946 is a wasteful number, since it uses less digits than its factorization.

421009946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970109.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 421009946 is about 20518.5268964417. The cubic root of 421009946 is about 749.4870246291.

The spelling of 421009946 in words is "four hundred twenty-one million, nine thousand, nine hundred forty-six".