421785000 has 480 divisors, whose sum is σ = 1773932160. Its totient is φ = 88128000.

The previous prime is 421784969. The next prime is 421785037. The reversal of 421785000 is 587124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4094949 + ... + 4095051.

It is an arithmetic number, because the mean of its divisors is an integer number (3695692).

Almost surely, 2^421785000 is an apocalyptic number.

421785000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421785000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886966080).

421785000 is an abundant number, since it is smaller than the sum of its proper divisors (1352147160).

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

421785000 is a wasteful number, since it uses less digits than its factorization.

421785000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 421785000 is about 20537.4048993538. The cubic root of 421785000 is about 749.9466628736.

The spelling of 421785000 in words is "four hundred twenty-one million, seven hundred eighty-five thousand".