149243 has 4 divisors (see below), whose sum is σ = 158040. Its totient is φ = 140448.

The previous prime is 149239. The next prime is 149249. The reversal of 149243 is 342941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342941 = 17 ⋅20173.

It is a cyclic number.

It is not a de Polignac number, because 149243 - 2² = 149239 is a prime.

It is a d-powerful number, because it can be written as 1 + 4⁷ + 2¹³ + 9² + 4⁸ + 3¹⁰ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4373 + ... + 4406.

It is an arithmetic number, because the mean of its divisors is an integer number (39510).

2¹⁴⁹²⁴³ is an apocalyptic number.

149243 is a deficient number, since it is larger than the sum of its proper divisors (8797).

149243 is an equidigital number, since it uses as much as digits as its factorization.

149243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796.

The product of its digits is 864, while the sum is 23.

The square root of 149243 is about 386.3198156968. The cubic root of 149243 is about 53.0433962838.

The spelling of 149243 in words is "one hundred forty-nine thousand, two hundred forty-three".