421045418 has 16 divisors (see below), whose sum is σ = 638633160. Its totient is φ = 208175616.

The previous prime is 421045381. The next prime is 421045421. The reversal of 421045418 is 814540124.

It can be written as a sum of positive squares in 4 ways, for example, as 420537049 + 508369 = 20507^2 + 713^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127646 + ... + 130902.

Almost surely, 2^421045418 is an apocalyptic number.

421045418 is a deficient number, since it is larger than the sum of its proper divisors (217587742).

421045418 is a wasteful number, since it uses less digits than its factorization.

421045418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 421045418 is about 20519.3912677740. The cubic root of 421045418 is about 749.5080732665.

The spelling of 421045418 in words is "four hundred twenty-one million, forty-five thousand, four hundred eighteen".