421425186 has 96 divisors (see below), whose sum is σ = 1071439488. Its totient is φ = 109509120.

The previous prime is 421425181. The next prime is 421425211. The reversal of 421425186 is 681524124.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421425181) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270586 + ... + 272138.

It is an arithmetic number, because the mean of its divisors is an integer number (11160828).

Almost surely, 2^421425186 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421425186, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535719744).

421425186 is an abundant number, since it is smaller than the sum of its proper divisors (650014302).

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

421425186 is a wasteful number, since it uses less digits than its factorization.

421425186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1649 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 421425186 is about 20528.6430628037. The cubic root of 421425186 is about 749.7333487629.

The spelling of 421425186 in words is "four hundred twenty-one million, four hundred twenty-five thousand, one hundred eighty-six".