129650 has 12 divisors (see below), whose sum is σ = 241242. Its totient is φ = 51840.

The previous prime is 129643. The next prime is 129671. The reversal of 129650 is 56921.

It can be written as a sum of positive squares in 3 ways, for example, as 101761 + 27889 = 319^2 + 167^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

129650 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1247 + ... + 1346.

2¹²⁹⁶⁵⁰ is an apocalyptic number.

129650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129650 is a deficient number, since it is larger than the sum of its proper divisors (111592).

129650 is a wasteful number, since it uses less digits than its factorization.

129650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605 (or 2600 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 129650 is about 360.0694377478. The cubic root of 129650 is about 50.6124670495.

The spelling of 129650 in words is "one hundred twenty-nine thousand, six hundred fifty".