285469 has 2 divisors, whose sum is σ = 285470. Its totient is φ = 285468.

The previous prime is 285463. The next prime is 285473. The reversal of 285469 is 964582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240100 + 45369 = 490^2 + 213^2 .

It is a cyclic number.

It is not a de Polignac number, because 285469 - 2⁹ = 284957 is a prime.

It is a super-2 number, since 2×285469² = 162985099922, which contains 22 as substring.

285469 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142734 + 142735.

It is an arithmetic number, because the mean of its divisors is an integer number (142735).

2²⁸⁵⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

285469 is a deficient number, since it is larger than the sum of its proper divisors (1).

285469 is an equidigital number, since it uses as much as digits as its factorization.

285469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 285469 is about 534.2929907831. The cubic root of 285469 is about 65.8445223020.

The spelling of 285469 in words is "two hundred eighty-five thousand, four hundred sixty-nine".