191240 has 32 divisors (see below), whose sum is σ = 492480. Its totient is φ = 65472.

The previous prime is 191237. The next prime is 191249. The reversal of 191240 is 42191.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (191249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

2¹⁹¹²⁴⁰ is an apocalyptic number.

191240 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 191240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246240).

191240 is an abundant number, since it is smaller than the sum of its proper divisors (301240).

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

191240 is a wasteful number, since it uses less digits than its factorization.

191240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 697 counting only the distinct ones).

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

The square root of 191240 is about 437.3099587249. The cubic root of 191240 is about 57.6137634291.

The spelling of 191240 in words is "one hundred ninety-one thousand, two hundred forty".