129948 has 72 divisors (see below), whose sum is σ = 402192. Its totient is φ = 32256.

The previous prime is 129937. The next prime is 129953. The reversal of 129948 is 849921.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7636 + ... + 7652.

It is an arithmetic number, because the mean of its divisors is an integer number (5586).

2¹²⁹⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201096).

129948 is an abundant number, since it is smaller than the sum of its proper divisors (272244).

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

129948 is a wasteful number, since it uses less digits than its factorization.

129948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51 (or 42 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 129948 is about 360.4830093083. The cubic root of 129948 is about 50.6512148942.

The spelling of 129948 in words is "one hundred twenty-nine thousand, nine hundred forty-eight".