45139 has 2 divisors, whose sum is σ = 45140. Its totient is φ = 45138.

The previous prime is 45137. The next prime is 45161. The reversal of 45139 is 93154.

It is an a-pointer prime, because the next prime (45161) can be obtained adding 45139 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45139 - 2¹ = 45137 is a prime.

Together with 45137, it forms a pair of twin primes.

45139 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (45131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22569 + 22570.

It is an arithmetic number, because the mean of its divisors is an integer number (22570).

2⁴⁵¹³⁹ is an apocalyptic number.

45139 is a deficient number, since it is larger than the sum of its proper divisors (1).

45139 is an equidigital number, since it uses as much as digits as its factorization.

45139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 45139 is about 212.4594078877. The cubic root of 45139 is about 35.6055182289.

The spelling of 45139 in words is "forty-five thousand, one hundred thirty-nine".