145223 has 4 divisors (see below), whose sum is σ = 156408. Its totient is φ = 134040.

The previous prime is 145219. The next prime is 145253. The reversal of 145223 is 322541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322541 = 17 ⋅18973.

It is a cyclic number.

It is not a de Polignac number, because 145223 - 2² = 145219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145213) 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, 5573 + ... + 5598.

It is an arithmetic number, because the mean of its divisors is an integer number (39102).

2¹⁴⁵²²³ is an apocalyptic number.

145223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

145223 is a deficient number, since it is larger than the sum of its proper divisors (11185).

145223 is a wasteful number, since it uses less digits than its factorization.

145223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184.

The product of its digits is 240, while the sum is 17.

The square root of 145223 is about 381.0813561433. The cubic root of 145223 is about 52.5627971162.

Adding to 145223 its reverse (322541), we get a palindrome (467764).

The spelling of 145223 in words is "one hundred forty-five thousand, two hundred twenty-three".