145289 has 2 divisors, whose sum is σ = 145290. Its totient is φ = 145288.

The previous prime is 145283. The next prime is 145303. The reversal of 145289 is 982541.

145289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85264 + 60025 = 292^2 + 245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145289 is a prime.

It is a super-2 number, since 2×145289² = 42217787042, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (145283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72644 + 72645.

It is an arithmetic number, because the mean of its divisors is an integer number (72645).

2¹⁴⁵²⁸⁹ is an apocalyptic number.

It is an amenable number.

145289 is a deficient number, since it is larger than the sum of its proper divisors (1).

145289 is an equidigital number, since it uses as much as digits as its factorization.

145289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 145289 is about 381.1679419888. The cubic root of 145289 is about 52.5707587091.

It can be divided in two parts, 145 and 289, that multiplied together give a triangular number (41905 = T₂₈₉).

The spelling of 145289 in words is "one hundred forty-five thousand, two hundred eighty-nine".