4139509 has 8 divisors (see below), whose sum is σ = 4559328. Its totient is φ = 3726960.

The previous prime is 4139503. The next prime is 4139533. The reversal of 4139509 is 9059314.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4139509 - 2³ = 4139501 is a prime.

It is a super-2 number, since 2×4139509² = 34271069522162, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

4139509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4139501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582 + ... + 2935.

It is an arithmetic number, because the mean of its divisors is an integer number (569916).

Almost surely, 2^4139509 is an apocalyptic number.

It is an amenable number.

4139509 is a deficient number, since it is larger than the sum of its proper divisors (419819).

4139509 is a wasteful number, since it uses less digits than its factorization.

4139509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 4139509 is about 2034.5783346925. The cubic root of 4139509 is about 160.5645292619.

The spelling of 4139509 in words is "four million, one hundred thirty-nine thousand, five hundred nine".