815275 has 6 divisors (see below), whose sum is σ = 1010972. Its totient is φ = 652200.

The previous prime is 815273. The next prime is 815279. The reversal of 815275 is 572518.

815275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 815275 - 2¹ = 815273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (815273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16281 + ... + 16330.

2⁸¹⁵²⁷⁵ is an apocalyptic number.

815275 is a deficient number, since it is larger than the sum of its proper divisors (195697).

815275 is a wasteful number, since it uses less digits than its factorization.

815275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621 (or 32616 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 815275 is about 902.9257998308. The cubic root of 815275 is about 93.4188912170.

It can be divided in two parts, 81 and 5275, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 815275 in words is "eight hundred fifteen thousand, two hundred seventy-five".