149123 has 4 divisors (see below), whose sum is σ = 160608. Its totient is φ = 137640.

The previous prime is 149119. The next prime is 149143. The reversal of 149123 is 321941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321941 = 43 ⋅7487.

It is a cyclic number.

It is not a de Polignac number, because 149123 - 2² = 149119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 149095 and 149104.

It is not an unprimeable number, because it can be changed into a prime (149113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5723 + ... + 5748.

It is an arithmetic number, because the mean of its divisors is an integer number (40152).

2¹⁴⁹¹²³ is an apocalyptic number.

149123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

149123 is a deficient number, since it is larger than the sum of its proper divisors (11485).

149123 is a wasteful number, since it uses less digits than its factorization.

149123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11484.

The product of its digits is 216, while the sum is 20.

The square root of 149123 is about 386.1644727315. The cubic root of 149123 is about 53.0291758194.

It can be divided in two parts, 149 and 123, that added together give a palindrome (272).

The spelling of 149123 in words is "one hundred forty-nine thousand, one hundred twenty-three".