843401421 has 24 divisors (see below), whose sum is σ = 1305582720. Its totient is φ = 523280736.

The previous prime is 843401371. The next prime is 843401423. The reversal of 843401421 is 124104348.

It is not a de Polignac number, because 843401421 - 2⁶ = 843401357 is a prime.

It is a super-2 number, since 2×843401421² = 1422651913889638482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843401423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47401 + ... + 62718.

It is an arithmetic number, because the mean of its divisors is an integer number (54399280).

Almost surely, 2^843401421 is an apocalyptic number.

It is an amenable number.

843401421 is a deficient number, since it is larger than the sum of its proper divisors (462181299).

843401421 is a wasteful number, since it uses less digits than its factorization.

843401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110185 (or 110182 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 843401421 is about 29041.3742959936. The cubic root of 843401421 is about 944.8106414913.

Adding to 843401421 its reverse (124104348), we get a palindrome (967505769).

The spelling of 843401421 in words is "eight hundred forty-three million, four hundred one thousand, four hundred twenty-one".