809215 has 8 divisors (see below), whose sum is σ = 1059408. Its totient is φ = 588480.

The previous prime is 809213. The next prime is 809231. The reversal of 809215 is 512908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809215 - 2¹ = 809213 is a prime.

It is a d-powerful number, because it can be written as 8⁶ + 0 + 2² + 9⁶ + 1 + 5⁶ .

It is a Duffinian number.

809215 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 809215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7302 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (132426).

2⁸⁰⁹²¹⁵ is an apocalyptic number.

809215 is a deficient number, since it is larger than the sum of its proper divisors (250193).

809215 is a wasteful number, since it uses less digits than its factorization.

809215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14729.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 809215 is about 899.5637831749. The cubic root of 809215 is about 93.1868521427.

It can be divided in two parts, 809 and 215, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 809215 in words is "eight hundred nine thousand, two hundred fifteen".