191420 has 24 divisors (see below), whose sum is σ = 426384. Its totient is φ = 71936.

The previous prime is 191413. The next prime is 191441. The reversal of 191420 is 24191.

191420 = 98² + 99² + ... + 114².

It is a happy number.

191420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (17766).

2¹⁹¹⁴²⁰ is an apocalyptic number.

191420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213192).

191420 is an abundant number, since it is smaller than the sum of its proper divisors (234964).

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

191420 is a wasteful number, since it uses less digits than its factorization.

191420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 191420 is about 437.5157140035. The cubic root of 191420 is about 57.6318336122.

The spelling of 191420 in words is "one hundred ninety-one thousand, four hundred twenty".