129772 has 6 divisors (see below), whose sum is σ = 227108. Its totient is φ = 64884.

The previous prime is 129769. The next prime is 129793. The reversal of 129772 is 277921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129772.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16218 + ... + 16225.

2¹²⁹⁷⁷² is an apocalyptic number.

It is an amenable number.

129772 is a deficient number, since it is larger than the sum of its proper divisors (97336).

129772 is a wasteful number, since it uses less digits than its factorization.

129772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32447 (or 32445 counting only the distinct ones).

The product of its digits is 1764, while the sum is 28.

The square root of 129772 is about 360.2388096805. The cubic root of 129772 is about 50.6283374318.

It can be divided in two parts, 1297 and 72, that added together give a square (1369 = 37²).

The spelling of 129772 in words is "one hundred twenty-nine thousand, seven hundred seventy-two".