845245 has 4 divisors (see below), whose sum is σ = 1014300. Its totient is φ = 676192.

The previous prime is 845237. The next prime is 845261. The reversal of 845245 is 542548.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363609 + 481636 = 603^2 + 694^2 .

It is a cyclic number.

It is not a de Polignac number, because 845245 - 2³ = 845237 is a prime.

It is a super-2 number, since 2×845245² = 1428878220050, which contains 22 as substring.

845245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84520 + ... + 84529.

It is an arithmetic number, because the mean of its divisors is an integer number (253575).

2⁸⁴⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

845245 is a deficient number, since it is larger than the sum of its proper divisors (169055).

845245 is a wasteful number, since it uses less digits than its factorization.

845245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169054.

The product of its digits is 6400, while the sum is 28.

The square root of 845245 is about 919.3720683162. The cubic root of 845245 is about 94.5498556484.

It can be divided in two parts, 845 and 245, that multiplied together give a square (207025 = 455²).

The spelling of 845245 in words is "eight hundred forty-five thousand, two hundred forty-five".