421166206 has 4 divisors (see below), whose sum is σ = 631749312. Its totient is φ = 210583102.

The previous prime is 421166197. The next prime is 421166233. The reversal of 421166206 is 602661124.

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

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, 105291550 + ... + 105291553.

It is an arithmetic number, because the mean of its divisors is an integer number (157937328).

Almost surely, 2^421166206 is an apocalyptic number.

421166206 is a deficient number, since it is larger than the sum of its proper divisors (210583106).

421166206 is a wasteful number, since it uses less digits than its factorization.

421166206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210583105.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 421166206 is about 20522.3343214168. The cubic root of 421166206 is about 749.5797384769.

The spelling of 421166206 in words is "four hundred twenty-one million, one hundred sixty-six thousand, two hundred six".