812560 has 40 divisors (see below), whose sum is σ = 2160576. Its totient is φ = 278400.

The previous prime is 812527. The next prime is 812587. The reversal of 812560 is 65218.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166 + ... + 1285.

2⁸¹²⁵⁶⁰ is an apocalyptic number.

812560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080288).

812560 is an abundant number, since it is smaller than the sum of its proper divisors (1348016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

812560 is a wasteful number, since it uses less digits than its factorization.

812560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 812560 is about 901.4211002634. The cubic root of 812560 is about 93.3150757938.

Adding to 812560 its reverse (65218), we get a palindrome (877778).

The spelling of 812560 in words is "eight hundred twelve thousand, five hundred sixty".