149191 has 4 divisors (see below), whose sum is σ = 170512. Its totient is φ = 127872.

The previous prime is 149183. The next prime is 149197. The reversal of 149191 is 191941.

149191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191941 = 367 ⋅523.

It is a cyclic number.

It is not a de Polignac number, because 149191 - 2³ = 149183 is a prime.

It is a Duffinian number.

149191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149197) 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, 10650 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (42628).

2¹⁴⁹¹⁹¹ is an apocalyptic number.

149191 is a deficient number, since it is larger than the sum of its proper divisors (21321).

149191 is an equidigital number, since it uses as much as digits as its factorization.

149191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21320.

The product of its digits is 324, while the sum is 25.

The square root of 149191 is about 386.2525080825. The cubic root of 149191 is about 53.0372350188.

The spelling of 149191 in words is "one hundred forty-nine thousand, one hundred ninety-one".