845139 has 8 divisors (see below), whose sum is σ = 1186240. Its totient is φ = 533736.

The previous prime is 845137. The next prime is 845167. The reversal of 845139 is 931548.

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

It is not a de Polignac number, because 845139 - 2¹ = 845137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7357 + ... + 7470.

It is an arithmetic number, because the mean of its divisors is an integer number (148280).

2⁸⁴⁵¹³⁹ is an apocalyptic number.

845139 is a deficient number, since it is larger than the sum of its proper divisors (341101).

845139 is a wasteful number, since it uses less digits than its factorization.

845139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14849.

The product of its digits is 4320, while the sum is 30.

The square root of 845139 is about 919.3144184663. The cubic root of 845139 is about 94.5459030652.

The spelling of 845139 in words is "eight hundred forty-five thousand, one hundred thirty-nine".