4065439 has 8 divisors (see below), whose sum is σ = 4661280. Its totient is φ = 3473376.

The previous prime is 4065427. The next prime is 4065461. The reversal of 4065439 is 9345604.

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 4065439 - 2¹³ = 4057247 is a prime.

It is a Duffinian number.

4065439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4065439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4065409) 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, 1977 + ... + 3469.

It is an arithmetic number, because the mean of its divisors is an integer number (582660).

Almost surely, 2^4065439 is an apocalyptic number.

4065439 is a deficient number, since it is larger than the sum of its proper divisors (595841).

4065439 is a wasteful number, since it uses less digits than its factorization.

4065439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 4065439 is about 2016.2933814304. The cubic root of 4065439 is about 159.6010765145.

The spelling of 4065439 in words is "four million, sixty-five thousand, four hundred thirty-nine".