805147 has 4 divisors (see below), whose sum is σ = 920176. Its totient is φ = 690120.

The previous prime is 805121. The next prime is 805153. The reversal of 805147 is 741508.

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

It is a cyclic number.

It is not a de Polignac number, because 805147 - 2⁷ = 805019 is a prime.

It is a Duffinian number.

805147 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 805147.

It is not an unprimeable number, because it can be changed into a prime (805177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57504 + ... + 57517.

It is an arithmetic number, because the mean of its divisors is an integer number (230044).

2⁸⁰⁵¹⁴⁷ is an apocalyptic number.

805147 is a deficient number, since it is larger than the sum of its proper divisors (115029).

805147 is a wasteful number, since it uses less digits than its factorization.

805147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115028.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 805147 is about 897.2998384041. The cubic root of 805147 is about 93.0304367175.

The spelling of 805147 in words is "eight hundred five thousand, one hundred forty-seven".