9145139 has 2 divisors, whose sum is σ = 9145140. Its totient is φ = 9145138.

The previous prime is 9145127. The next prime is 9145151. The reversal of 9145139 is 9315419.

9145139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (9145127) and next prime (9145151).

It is an emirp because it is prime and its reverse (9315419) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145139 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9145109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572569 + 4572570.

It is an arithmetic number, because the mean of its divisors is an integer number (4572570).

Almost surely, 2^9145139 is an apocalyptic number.

9145139 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145139 is an equidigital number, since it uses as much as digits as its factorization.

9145139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 32.

The square root of 9145139 is about 3024.0930871916. The cubic root of 9145139 is about 209.1205778430.

The spelling of 9145139 in words is "nine million, one hundred forty-five thousand, one hundred thirty-nine".