145173 has 16 divisors (see below), whose sum is σ = 229376. Its totient is φ = 79920.

The previous prime is 145139. The next prime is 145177. The reversal of 145173 is 371541.

145173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145173 - 2⁶ = 145109 is a prime.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540 + ... + 762.

It is an arithmetic number, because the mean of its divisors is an integer number (14336).

2¹⁴⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

145173 is a deficient number, since it is larger than the sum of its proper divisors (84203).

145173 is a wasteful number, since it uses less digits than its factorization.

145173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its digits is 420, while the sum is 21.

The square root of 145173 is about 381.0157477060. The cubic root of 145173 is about 52.5567640004.

The spelling of 145173 in words is "one hundred forty-five thousand, one hundred seventy-three".