145189 has 8 divisors (see below), whose sum is σ = 161568. Its totient is φ = 129360.

The previous prime is 145177. The next prime is 145193. The reversal of 145189 is 981541.

It is a happy number.

145189 is nontrivially palindromic in base 13.

145189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145189 - 2¹¹ = 143141 is a prime.

145189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (20196).

2¹⁴⁵¹⁸⁹ is an apocalyptic number.

It is an amenable number.

145189 is a deficient number, since it is larger than the sum of its proper divisors (16379).

145189 is a wasteful number, since it uses less digits than its factorization.

145189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its digits is 1440, while the sum is 28.

The square root of 145189 is about 381.0367436350. The cubic root of 145189 is about 52.5586947481.

Subtracting from 145189 its sum of digits (28), we obtain a square (145161 = 381²).

It can be divided in two parts, 1451 and 89, that added together give a triangular number (1540 = T₅₅).

The spelling of 145189 in words is "one hundred forty-five thousand, one hundred eighty-nine".