129341772 has 90 divisors (see below), whose sum is σ = 393377292. Its totient is φ = 36950256.

The previous prime is 129341767. The next prime is 129341801. The reversal of 129341772 is 277143921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 11803 + ... + 19949.

Almost surely, 2^129341772 is an apocalyptic number.

129341772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129341772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196688646).

129341772 is an abundant number, since it is smaller than the sum of its proper divisors (264035520).

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

129341772 is a wasteful number, since it uses less digits than its factorization.

129341772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177 (or 8159 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 129341772 is about 11372.8524126536. The cubic root of 129341772 is about 505.7232677848.

It can be divided in two parts, 12934 and 1772, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 129341772 in words is "one hundred twenty-nine million, three hundred forty-one thousand, seven hundred seventy-two".