845145 has 24 divisors (see below), whose sum is σ = 1674816. Its totient is φ = 386208.

The previous prime is 845137. The next prime is 845167. The reversal of 845145 is 541548.

It is not a de Polignac number, because 845145 - 2³ = 845137 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1027 + ... + 1656.

It is an arithmetic number, because the mean of its divisors is an integer number (69784).

2⁸⁴⁵¹⁴⁵ is an apocalyptic number.

It is an amenable number.

845145 is a deficient number, since it is larger than the sum of its proper divisors (829671).

845145 is a wasteful number, since it uses less digits than its factorization.

845145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701 (or 2698 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 845145 is about 919.3176817619. The cubic root of 845145 is about 94.5461268051.

It can be divided in two parts, 845 and 145, that added together give a triangular number (990 = T₄₄).

The spelling of 845145 in words is "eight hundred forty-five thousand, one hundred forty-five".