129001734 has 20 divisors (see below), whose sum is σ = 289059804. Its totient is φ = 43000524.

The previous prime is 129001727. The next prime is 129001739. The reversal of 129001734 is 437100921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 129001698 and 129001707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129001739) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 397992 + ... + 398315.

Almost surely, 2^129001734 is an apocalyptic number.

129001734 is an abundant number, since it is smaller than the sum of its proper divisors (160058070).

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

129001734 is an equidigital number, since it uses as much as digits as its factorization.

129001734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796321 (or 796312 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 129001734 is about 11357.8930264376. The cubic root of 129001734 is about 505.2796986670.

The spelling of 129001734 in words is "one hundred twenty-nine million, one thousand, seven hundred thirty-four".