4085569 has 4 divisors (see below), whose sum is σ = 4172544. Its totient is φ = 3998596.

The previous prime is 4085567. The next prime is 4085579. The reversal of 4085569 is 9655804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4085569 - 2¹ = 4085567 is a prime.

It is a super-2 number, since 2×4085569² = 33383748107522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4085561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43417 + ... + 43510.

It is an arithmetic number, because the mean of its divisors is an integer number (1043136).

Almost surely, 2^4085569 is an apocalyptic number.

It is an amenable number.

4085569 is a deficient number, since it is larger than the sum of its proper divisors (86975).

4085569 is an equidigital number, since it uses as much as digits as its factorization.

4085569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86974.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 4085569 is about 2021.2790505024. The cubic root of 4085569 is about 159.8640642294.

The spelling of 4085569 in words is "four million, eighty-five thousand, five hundred sixty-nine".