406039 has 4 divisors (see below), whose sum is σ = 408880. Its totient is φ = 403200.

The previous prime is 406037. The next prime is 406067. The reversal of 406039 is 930604.

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

It is a cyclic number.

It is not a de Polignac number, because 406039 - 2¹ = 406037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406037) 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, 1194 + ... + 1495.

It is an arithmetic number, because the mean of its divisors is an integer number (102220).

2⁴⁰⁶⁰³⁹ is an apocalyptic number.

406039 is a deficient number, since it is larger than the sum of its proper divisors (2841).

406039 is a wasteful number, since it uses less digits than its factorization.

406039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 406039 is about 637.2118956831. The cubic root of 406039 is about 74.0495771990.

The spelling of 406039 in words is "four hundred six thousand, thirty-nine".