426191 has 4 divisors (see below), whose sum is σ = 427512. Its totient is φ = 424872.

The previous prime is 426163. The next prime is 426193. The reversal of 426191 is 191624.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (106878).

2⁴²⁶¹⁹¹ is an apocalyptic number.

426191 is a deficient number, since it is larger than the sum of its proper divisors (1321).

426191 is an equidigital number, since it uses as much as digits as its factorization.

426191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its digits is 432, while the sum is 23.

The square root of 426191 is about 652.8330567611. The cubic root of 426191 is about 75.2548956907.

The spelling of 426191 in words is "four hundred twenty-six thousand, one hundred ninety-one".