805749 has 32 divisors (see below), whose sum is σ = 1357056. Its totient is φ = 414720.

The previous prime is 805741. The next prime is 805757. The reversal of 805749 is 947508.

It is an interprime number because it is at equal distance from previous prime (805741) and next prime (805757).

It is not a de Polignac number, because 805749 - 2³ = 805741 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805741) 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 31 ways as a sum of consecutive naturals, for example, 13179 + ... + 13239.

It is an arithmetic number, because the mean of its divisors is an integer number (42408).

2⁸⁰⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

805749 is a deficient number, since it is larger than the sum of its proper divisors (551307).

805749 is a wasteful number, since it uses less digits than its factorization.

805749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 805749 is about 897.6352265815. The cubic root of 805749 is about 93.0536169031.

The spelling of 805749 in words is "eight hundred five thousand, seven hundred forty-nine".