421524220 has 48 divisors (see below), whose sum is σ = 994754880. Its totient is φ = 148870656.

The previous prime is 421524209. The next prime is 421524221. The reversal of 421524220 is 22425124.

It is a junction number, because it is equal to n+sod(n) for n = 421524191 and 421524200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421524221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29265 + ... + 41224.

It is an arithmetic number, because the mean of its divisors is an integer number (20724060).

Almost surely, 2^421524220 is an apocalyptic number.

It is an amenable number.

421524220 is an abundant number, since it is smaller than the sum of its proper divisors (573230660).

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

421524220 is a wasteful number, since it uses less digits than its factorization.

421524220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70534 (or 70532 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 421524220 is about 20531.0550142948. The cubic root of 421524220 is about 749.7920727307.

Adding to 421524220 its reverse (22425124), we get a palindrome (443949344).

The spelling of 421524220 in words is "four hundred twenty-one million, five hundred twenty-four thousand, two hundred twenty".