191120 has 20 divisors (see below), whose sum is σ = 444540. Its totient is φ = 76416.

The previous prime is 191119. The next prime is 191123. The reversal of 191120 is 21191.

It can be written as a sum of positive squares in 2 ways, for example, as 55696 + 135424 = 236^2 + 368^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 191095 and 191104.

It is not an unprimeable number, because it can be changed into a prime (191123) 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, 1115 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (22227).

2¹⁹¹¹²⁰ is an apocalyptic number.

191120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

191120 is an abundant number, since it is smaller than the sum of its proper divisors (253420).

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

191120 is a wasteful number, since it uses less digits than its factorization.

191120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 191120 is about 437.1727347399. The cubic root of 191120 is about 57.6017103402.

The spelling of 191120 in words is "one hundred ninety-one thousand, one hundred twenty".