818485 has 4 divisors (see below), whose sum is σ = 982188. Its totient is φ = 654784.

The previous prime is 818473. The next prime is 818509. The reversal of 818485 is 584818.

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 459684 + 358801 = 678^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 818485 - 2⁵ = 818453 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 818485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81844 + ... + 81853.

It is an arithmetic number, because the mean of its divisors is an integer number (245547).

2⁸¹⁸⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

818485 is a deficient number, since it is larger than the sum of its proper divisors (163703).

818485 is a wasteful number, since it uses less digits than its factorization.

818485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163702.

The product of its digits is 10240, while the sum is 34.

The square root of 818485 is about 904.7016082665. The cubic root of 818485 is about 93.5413373985.

The spelling of 818485 in words is "eight hundred eighteen thousand, four hundred eighty-five".