421143128 has 32 divisors (see below), whose sum is σ = 903117600. Its totient is φ = 180356352.

The previous prime is 421143127. The next prime is 421143131. The reversal of 421143128 is 821341124.

It is a junction number, because it is equal to n+sod(n) for n = 421143097 and 421143106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421143127) 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 7 ways as a sum of consecutive naturals, for example, 127676 + ... + 130932.

It is an arithmetic number, because the mean of its divisors is an integer number (28222425).

Almost surely, 2^421143128 is an apocalyptic number.

It is an amenable number.

421143128 is an abundant number, since it is smaller than the sum of its proper divisors (481974472).

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

421143128 is a wasteful number, since it uses less digits than its factorization.

421143128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579 (or 5575 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 421143128 is about 20521.7720482418. The cubic root of 421143128 is about 749.5660470356.

The spelling of 421143128 in words is "four hundred twenty-one million, one hundred forty-three thousand, one hundred twenty-eight".