145243 has 4 divisors (see below), whose sum is σ = 166000. Its totient is φ = 124488.

The previous prime is 145219. The next prime is 145253. The reversal of 145243 is 342541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342541 = 83 ⋅4127.

It is not a de Polignac number, because 145243 - 2⁹ = 144731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145243.

It is not an unprimeable number, because it can be changed into a prime (145213) 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, 10368 + ... + 10381.

It is an arithmetic number, because the mean of its divisors is an integer number (41500).

2¹⁴⁵²⁴³ is an apocalyptic number.

145243 is a deficient number, since it is larger than the sum of its proper divisors (20757).

145243 is an equidigital number, since it uses as much as digits as its factorization.

145243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20756.

The product of its digits is 480, while the sum is 19.

The square root of 145243 is about 381.1075963557. The cubic root of 145243 is about 52.5652099748.

Adding to 145243 its reverse (342541), we get a palindrome (487784).

The spelling of 145243 in words is "one hundred forty-five thousand, two hundred forty-three".