418685421 has 32 divisors (see below), whose sum is σ = 702793728. Its totient is φ = 215375040.

The previous prime is 418685419. The next prime is 418685437. The reversal of 418685421 is 124586814.

It is not a de Polignac number, because 418685421 - 2¹ = 418685419 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 418685421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418681421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14995 + ... + 32591.

It is an arithmetic number, because the mean of its divisors is an integer number (21962304).

Almost surely, 2^418685421 is an apocalyptic number.

It is an amenable number.

418685421 is a deficient number, since it is larger than the sum of its proper divisors (284108307).

418685421 is a wasteful number, since it uses less digits than its factorization.

418685421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721.

The product of its digits is 61440, while the sum is 39.

The square root of 418685421 is about 20461.8039527310. The cubic root of 418685421 is about 748.1050955928.

The spelling of 418685421 in words is "four hundred eighteen million, six hundred eighty-five thousand, four hundred twenty-one".