129950 has 24 divisors (see below), whose sum is σ = 254448. Its totient is φ = 49280.

The previous prime is 129937. The next prime is 129953. The reversal of 129950 is 59921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1094 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (10602).

2¹²⁹⁹⁵⁰ is an apocalyptic number.

129950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129950 is a deficient number, since it is larger than the sum of its proper divisors (124498).

129950 is a wasteful number, since it uses less digits than its factorization.

129950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 129950 is about 360.4857833535. The cubic root of 129950 is about 50.6514747466.

Multiplying 129950 by its sum of digits (26), we get a triangular number (3378700 = T₂₅₉₉).

The spelling of 129950 in words is "one hundred twenty-nine thousand, nine hundred fifty".