4185009 has 18 divisors (see below), whose sum is σ = 6425510. Its totient is φ = 2624256.

The previous prime is 4185007. The next prime is 4185029. The reversal of 4185009 is 9005814.

It can be written as a sum of positive squares in 3 ways, for example, as 2985984 + 1199025 = 1728^2 + 1095^2 .

It is not a de Polignac number, because 4185009 - 2¹ = 4185007 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4185007) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1797 + ... + 3405.

Almost surely, 2^4185009 is an apocalyptic number.

It is an amenable number.

4185009 is a deficient number, since it is larger than the sum of its proper divisors (2240501).

4185009 is a wasteful number, since it uses less digits than its factorization.

4185009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 4185009 is about 2045.7294542534. The cubic root of 4185009 is about 161.1506761684.

The spelling of 4185009 in words is "four million, one hundred eighty-five thousand, nine".