421100 has 18 divisors (see below), whose sum is σ = 914004. Its totient is φ = 168400.

The previous prime is 421093. The next prime is 421103. The reversal of 421100 is 1124.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (421103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2006 + ... + 2205.

It is an arithmetic number, because the mean of its divisors is an integer number (50778).

2⁴²¹¹⁰⁰ is an apocalyptic number.

It is an amenable number.

421100 is an abundant number, since it is smaller than the sum of its proper divisors (492904).

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

421100 is a wasteful number, since it uses less digits than its factorization.

421100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4225 (or 4218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 421100 is about 648.9221833163. The cubic root of 421100 is about 74.9540459228.

Adding to 421100 its reverse (1124), we get a palindrome (422224).

The spelling of 421100 in words is "four hundred twenty-one thousand, one hundred", and thus it is an iban number.