815273 has 2 divisors, whose sum is σ = 815274. Its totient is φ = 815272.

The previous prime is 815261. The next prime is 815279. The reversal of 815273 is 372518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652864 + 162409 = 808^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 815273 - 2⁴ = 815257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p₆₅₀₆₉ and since 815273 and 65069 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (815279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407636 + 407637.

It is an arithmetic number, because the mean of its divisors is an integer number (407637).

2⁸¹⁵²⁷³ is an apocalyptic number.

It is an amenable number.

815273 is a deficient number, since it is larger than the sum of its proper divisors (1).

815273 is an equidigital number, since it uses as much as digits as its factorization.

815273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 26.

The square root of 815273 is about 902.9246923194. The cubic root of 815273 is about 93.4188148265.

The spelling of 815273 in words is "eight hundred fifteen thousand, two hundred seventy-three".