145109 has 2 divisors, whose sum is σ = 145110. Its totient is φ = 145108.

The previous prime is 145091. The next prime is 145121. The reversal of 145109 is 901541.

Together with previous prime (145091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84100 + 61009 = 290^2 + 247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145109.

It is not a weakly prime, because it can be changed into another prime (145139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72554 + 72555.

It is an arithmetic number, because the mean of its divisors is an integer number (72555).

2¹⁴⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

145109 is a deficient number, since it is larger than the sum of its proper divisors (1).

145109 is an equidigital number, since it uses as much as digits as its factorization.

145109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 145109 is about 380.9317524177. The cubic root of 145109 is about 52.5490395904.

The spelling of 145109 in words is "one hundred forty-five thousand, one hundred nine".