421554500 has 48 divisors (see below), whose sum is σ = 924618240. Its totient is φ = 167900000.

The previous prime is 421554481. The next prime is 421554503. The reversal of 421554500 is 5455124.

It is a self number, because there is not a number n which added to its sum of digits gives 421554500.

It is not an unprimeable number, because it can be changed into a prime (421554503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123821 + ... + 127179.

It is an arithmetic number, because the mean of its divisors is an integer number (19262880).

Almost surely, 2^421554500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421554500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462309120).

421554500 is an abundant number, since it is smaller than the sum of its proper divisors (503063740).

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

421554500 is a wasteful number, since it uses less digits than its factorization.

421554500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 421554500 is about 20531.7924205365. The cubic root of 421554500 is about 749.8100259580.

The spelling of 421554500 in words is "four hundred twenty-one million, five hundred fifty-four thousand, five hundred".