421475566 has 8 divisors (see below), whose sum is σ = 652607424. Its totient is φ = 203939760.

The previous prime is 421475563. The next prime is 421475567. The reversal of 421475566 is 665574124.

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 (421475563) 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, 3398935 + ... + 3399058.

It is an arithmetic number, because the mean of its divisors is an integer number (81575928).

Almost surely, 2^421475566 is an apocalyptic number.

421475566 is a deficient number, since it is larger than the sum of its proper divisors (231131858).

421475566 is a wasteful number, since it uses less digits than its factorization.

421475566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798026.

The product of its digits is 201600, while the sum is 40.

The square root of 421475566 is about 20529.8700921365. The cubic root of 421475566 is about 749.7632236275.

The spelling of 421475566 in words is "four hundred twenty-one million, four hundred seventy-five thousand, five hundred sixty-six".