201439 has 6 divisors (see below), whose sum is σ = 234384. Its totient is φ = 172620.

The previous prime is 201437. The next prime is 201449. The reversal of 201439 is 934102.

It is not a de Polignac number, because 201439 - 2¹ = 201437 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 (201437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2007 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (39064).

2²⁰¹⁴³⁹ is an apocalyptic number.

201439 is a deficient number, since it is larger than the sum of its proper divisors (32945).

201439 is an equidigital number, since it uses as much as digits as its factorization.

201439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 201439 is about 448.8195628535. The cubic root of 201439 is about 58.6202751074.

The spelling of 201439 in words is "two hundred one thousand, four hundred thirty-nine".