820275 has 12 divisors (see below), whose sum is σ = 1356312. Its totient is φ = 437440.

The previous prime is 820273. The next prime is 820279. The reversal of 820275 is 572028.

It is not a de Polignac number, because 820275 - 2¹ = 820273 is a prime.

It is a nialpdrome in base 7 and base 16.

It is not an unprimeable number, because it can be changed into a prime (820271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5394 + ... + 5543.

It is an arithmetic number, because the mean of its divisors is an integer number (113026).

2⁸²⁰²⁷⁵ is an apocalyptic number.

820275 is a deficient number, since it is larger than the sum of its proper divisors (536037).

820275 is a wasteful number, since it uses less digits than its factorization.

820275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10950 (or 10945 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 820275 is about 905.6903444335. The cubic root of 820275 is about 93.6094783666.

The spelling of 820275 in words is "eight hundred twenty thousand, two hundred seventy-five".