101439 has 24 divisors (see below), whose sum is σ = 171920. Its totient is φ = 58752.

The previous prime is 101429. The next prime is 101449. The reversal of 101439 is 934101.

It is an interprime number because it is at equal distance from previous prime (101429) and next prime (101449).

It is not a de Polignac number, because 101439 - 2⁸ = 101183 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 101439.

It is not an unprimeable number, because it can be changed into a prime (101419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5959 + ... + 5975.

2¹⁰¹⁴³⁹ is an apocalyptic number.

101439 is a deficient number, since it is larger than the sum of its proper divisors (70481).

101439 is a wasteful number, since it uses less digits than its factorization.

101439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 101439 is about 318.4948979183. The cubic root of 101439 is about 46.6374703998.

The spelling of 101439 in words is "one hundred one thousand, four hundred thirty-nine".