129545 has 8 divisors (see below), whose sum is σ = 167496. Its totient is φ = 95616.

The previous prime is 129539. The next prime is 129553. The reversal of 129545 is 545921.

It can be written as a sum of positive squares in 4 ways, for example, as 7744 + 121801 = 88^2 + 349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129545 - 2⁴ = 129529 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932 + ... + 1061.

It is an arithmetic number, because the mean of its divisors is an integer number (20937).

2¹²⁹⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

129545 is a deficient number, since it is larger than the sum of its proper divisors (37951).

129545 is a wasteful number, since it uses less digits than its factorization.

129545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011.

The product of its digits is 1800, while the sum is 26.

The square root of 129545 is about 359.9236030049. The cubic root of 129545 is about 50.5988001403.

The spelling of 129545 in words is "one hundred twenty-nine thousand, five hundred forty-five".