817312 has 12 divisors (see below), whose sum is σ = 1609146. Its totient is φ = 408640.

The previous prime is 817303. The next prime is 817319. The reversal of 817312 is 213718.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 104976 = 844^2 + 324^2 .

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (817319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739 + ... + 12802.

2⁸¹⁷³¹² is an apocalyptic number.

It is an amenable number.

817312 is a deficient number, since it is larger than the sum of its proper divisors (791834).

817312 is a wasteful number, since it uses less digits than its factorization.

817312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25551 (or 25543 counting only the distinct ones).

The product of its digits is 336, while the sum is 22.

The square root of 817312 is about 904.0530957859. The cubic root of 817312 is about 93.4966302273.

The spelling of 817312 in words is "eight hundred seventeen thousand, three hundred twelve".