385569 has 6 divisors (see below), whose sum is σ = 556946. Its totient is φ = 257040.

The previous prime is 385559. The next prime is 385571. The reversal of 385569 is 965583.

385569 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 374544 + 11025 = 612^2 + 105^2 .

It is not a de Polignac number, because 385569 - 2⁵ = 385537 is a prime.

It is a super-2 number, since 2×385569² = 297326907522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

385569 is strictly pandigital in base 7.

385569 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (385519) 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, 21412 + ... + 21429.

2³⁸⁵⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

385569 is a deficient number, since it is larger than the sum of its proper divisors (171377).

385569 is a wasteful number, since it uses less digits than its factorization.

385569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42847 (or 42844 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 385569 is about 620.9420262794. The cubic root of 385569 is about 72.7836844047.

The spelling of 385569 in words is "three hundred eighty-five thousand, five hundred sixty-nine".