129774 has 16 divisors (see below), whose sum is σ = 266112. Its totient is φ = 42168.

The previous prime is 129769. The next prime is 129793. The reversal of 129774 is 477921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7 + ... + 509.

It is an arithmetic number, because the mean of its divisors is an integer number (16632).

2¹²⁹⁷⁷⁴ is an apocalyptic number.

129774 is an abundant number, since it is smaller than the sum of its proper divisors (136338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129774 is a wasteful number, since it uses less digits than its factorization.

129774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551.

The product of its digits is 3528, while the sum is 30.

The square root of 129774 is about 360.2415856061. The cubic root of 129774 is about 50.6285975191.

It can be divided in two parts, 129 and 774, that added together give a triangular number (903 = T₄₂).

The spelling of 129774 in words is "one hundred twenty-nine thousand, seven hundred seventy-four".