805245 has 16 divisors (see below), whose sum is σ = 1472640. Its totient is φ = 368064.

The previous prime is 805241. The next prime is 805249. The reversal of 805245 is 542508.

It is an interprime number because it is at equal distance from previous prime (805241) and next prime (805249).

It is not a de Polignac number, because 805245 - 2² = 805241 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805241) 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 15 ways as a sum of consecutive naturals, for example, 3730 + ... + 3939.

It is an arithmetic number, because the mean of its divisors is an integer number (92040).

2⁸⁰⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

805245 is a deficient number, since it is larger than the sum of its proper divisors (667395).

805245 is a wasteful number, since it uses less digits than its factorization.

805245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7684.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 805245 is about 897.3544450216. The cubic root of 805245 is about 93.0342110232.

The spelling of 805245 in words is "eight hundred five thousand, two hundred forty-five".