421191 has 12 divisors (see below), whose sum is σ = 620568. Its totient is φ = 275184.

The previous prime is 421189. The next prime is 421207. The reversal of 421191 is 191124.

421191 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 421191 - 2¹ = 421189 is a prime.

421191 is strictly pandigital in base 7.

421191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421121) 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 11 ways as a sum of consecutive naturals, for example, 36 + ... + 918.

It is an arithmetic number, because the mean of its divisors is an integer number (51714).

2⁴²¹¹⁹¹ is an apocalyptic number.

421191 is a deficient number, since it is larger than the sum of its proper divisors (199377).

421191 is a wasteful number, since it uses less digits than its factorization.

421191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 939 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 421191 is about 648.9922957940. The cubic root of 421191 is about 74.9594447409.

The spelling of 421191 in words is "four hundred twenty-one thousand, one hundred ninety-one".