145224 has 24 divisors (see below), whose sum is σ = 393510. Its totient is φ = 48384.

The previous prime is 145219. The next prime is 145253. The reversal of 145224 is 422541.

It can be written as a sum of positive squares in only one way, i.e., 101124 + 44100 = 318^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 145197 and 145206.

It is an unprimeable number.

145224 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 937 + ... + 1080.

2¹⁴⁵²²⁴ is an apocalyptic number.

It is an amenable number.

145224 is an abundant number, since it is smaller than the sum of its proper divisors (248286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145224 is a wasteful number, since it uses less digits than its factorization.

145224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2022 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 145224 is about 381.0826681968. The cubic root of 145224 is about 52.5629177644.

Adding to 145224 its reverse (422541), we get a palindrome (567765).

The spelling of 145224 in words is "one hundred forty-five thousand, two hundred twenty-four".