129073 has 4 divisors (see below), whose sum is σ = 147520. Its totient is φ = 110628.

The previous prime is 129061. The next prime is 129083. The reversal of 129073 is 370921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 370921 = 23 ⋅16127.

It is a de Polignac number, because none of the positive numbers 2^k-129073 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (129023) 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, 9213 + ... + 9226.

It is an arithmetic number, because the mean of its divisors is an integer number (36880).

2¹²⁹⁰⁷³ is an apocalyptic number.

It is an amenable number.

129073 is a deficient number, since it is larger than the sum of its proper divisors (18447).

129073 is an equidigital number, since it uses as much as digits as its factorization.

129073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 129073 is about 359.2673099518. The cubic root of 129073 is about 50.5372727479.

Adding to 129073 its reverse (370921), we get a palindrome (499994).

The spelling of 129073 in words is "one hundred twenty-nine thousand, seventy-three".