145573 has 4 divisors (see below), whose sum is σ = 146700. Its totient is φ = 144448.

The previous prime is 145549. The next prime is 145577. The reversal of 145573 is 375541.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 375541 = 283 ⋅1327.

It can be written as a sum of positive squares in 2 ways, for example, as 79524 + 66049 = 282^2 + 257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145573 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 (145577) 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, 340 + ... + 637.

It is an arithmetic number, because the mean of its divisors is an integer number (36675).

2¹⁴⁵⁵⁷³ is an apocalyptic number.

It is an amenable number.

145573 is a deficient number, since it is larger than the sum of its proper divisors (1127).

145573 is an equidigital number, since it uses as much as digits as its factorization.

145573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its digits is 2100, while the sum is 25.

The square root of 145573 is about 381.5402993132. The cubic root of 145573 is about 52.6049902016.

The spelling of 145573 in words is "one hundred forty-five thousand, five hundred seventy-three".