421127820 has 72 divisors (see below), whose sum is σ = 1279133856. Its totient is φ = 112150272.

The previous prime is 421127803. The next prime is 421127827. The reversal of 421127820 is 28721124.

It is not an unprimeable number, because it can be changed into a prime (421127827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219184 + ... + 221096.

It is an arithmetic number, because the mean of its divisors is an integer number (17765748).

Almost surely, 2^421127820 is an apocalyptic number.

It is an amenable number.

421127820 is an abundant number, since it is smaller than the sum of its proper divisors (858006036).

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

421127820 is a wasteful number, since it uses less digits than its factorization.

421127820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 421127820 is about 20521.3990751118. The cubic root of 421127820 is about 749.5569650115.

Adding to 421127820 its reverse (28721124), we get a palindrome (449848944).

The spelling of 421127820 in words is "four hundred twenty-one million, one hundred twenty-seven thousand, eight hundred twenty".