4165985 has 4 divisors (see below), whose sum is σ = 4999188. Its totient is φ = 3332784.

The previous prime is 4165979. The next prime is 4165991. The reversal of 4165985 is 5895614.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4165979) and next prime (4165991).

It can be written as a sum of positive squares in 2 ways, for example, as 1682209 + 2483776 = 1297^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 4165985 - 2⁸ = 4165729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416594 + ... + 416603.

It is an arithmetic number, because the mean of its divisors is an integer number (1249797).

Almost surely, 2^4165985 is an apocalyptic number.

It is an amenable number.

4165985 is a deficient number, since it is larger than the sum of its proper divisors (833203).

4165985 is an equidigital number, since it uses as much as digits as its factorization.

4165985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833202.

The product of its digits is 43200, while the sum is 38.

The square root of 4165985 is about 2041.0744719387. The cubic root of 4165985 is about 160.9061217299.

The spelling of 4165985 in words is "four million, one hundred sixty-five thousand, nine hundred eighty-five".