285023 has 2 divisors, whose sum is σ = 285024. Its totient is φ = 285022.

The previous prime is 285007. The next prime is 285031. The reversal of 285023 is 320582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285023 - 2⁴ = 285007 is a prime.

It is a super-2 number, since 2×285023² = 162476221058, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 284986 and 285004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285823) by changing a digit.

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 as a sum of consecutive naturals, namely, 142511 + 142512.

It is an arithmetic number, because the mean of its divisors is an integer number (142512).

2²⁸⁵⁰²³ is an apocalyptic number.

285023 is a deficient number, since it is larger than the sum of its proper divisors (1).

285023 is an equidigital number, since it uses as much as digits as its factorization.

285023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 285023 is about 533.8754536406. The cubic root of 285023 is about 65.8102138904.

The spelling of 285023 in words is "two hundred eighty-five thousand, twenty-three".