421475418 has 48 divisors (see below), whose sum is σ = 1123938816. Its totient is φ = 111157920.

The previous prime is 421475389. The next prime is 421475419. The reversal of 421475418 is 814574124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (421475419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127018 + ... + 130293.

It is an arithmetic number, because the mean of its divisors is an integer number (23415392).

Almost surely, 2^421475418 is an apocalyptic number.

421475418 is an abundant number, since it is smaller than the sum of its proper divisors (702463398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421475418 is a wasteful number, since it uses less digits than its factorization.

421475418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257339 (or 257336 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 421475418 is about 20529.8664876321. The cubic root of 421475418 is about 749.7631358684.

The spelling of 421475418 in words is "four hundred twenty-one million, four hundred seventy-five thousand, four hundred eighteen".