421608506 has 16 divisors (see below), whose sum is σ = 690228000. Its totient is φ = 191550480.

The previous prime is 421608503. The next prime is 421608511. The reversal of 421608506 is 605806124.

It is not an unprimeable number, because it can be changed into a prime (421608503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74240 + ... + 79716.

It is an arithmetic number, because the mean of its divisors is an integer number (43139250).

Almost surely, 2^421608506 is an apocalyptic number.

421608506 is a deficient number, since it is larger than the sum of its proper divisors (268619494).

421608506 is a wasteful number, since it uses less digits than its factorization.

421608506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8989.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 421608506 is about 20533.1075582826. The cubic root of 421608506 is about 749.8420443653.

The spelling of 421608506 in words is "four hundred twenty-one million, six hundred eight thousand, five hundred six".