812275 has 6 divisors (see below), whose sum is σ = 1007252. Its totient is φ = 649800.

The previous prime is 812267. The next prime is 812281. The reversal of 812275 is 572218.

It is not a de Polignac number, because 812275 - 2³ = 812267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 32491 = 812275 / (8 + 1 + 2 + 2 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16221 + ... + 16270.

2⁸¹²²⁷⁵ is an apocalyptic number.

812275 is a deficient number, since it is larger than the sum of its proper divisors (194977).

812275 is a wasteful number, since it uses less digits than its factorization.

812275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32501 (or 32496 counting only the distinct ones).

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

The square root of 812275 is about 901.2630026801. The cubic root of 812275 is about 93.3041646379.

The spelling of 812275 in words is "eight hundred twelve thousand, two hundred seventy-five".