133139 has 4 divisors (see below), whose sum is σ = 137760. Its totient is φ = 128520.

The previous prime is 133121. The next prime is 133153. The reversal of 133139 is 931331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931331 = 79 ⋅11789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133139.

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 133139.

It is not an unprimeable number, because it can be changed into a prime (133109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2267 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (34440).

2¹³³¹³⁹ is an apocalyptic number.

133139 is a deficient number, since it is larger than the sum of its proper divisors (4621).

133139 is an equidigital number, since it uses as much as digits as its factorization.

133139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620.

The product of its digits is 243, while the sum is 20.

The square root of 133139 is about 364.8821727627. The cubic root of 133139 is about 51.0624635137.

It can be divided in two parts, 133 and 139, that added together give a palindrome (272).

The spelling of 133139 in words is "one hundred thirty-three thousand, one hundred thirty-nine".