129290112 has 96 divisors (see below), whose sum is σ = 425221680. Its totient is φ = 36937728.

The previous prime is 129290111. The next prime is 129290113. The reversal of 129290112 is 211092921.

It is an interprime number because it is at equal distance from previous prime (129290111) and next prime (129290113).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129290111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48 + ... + 16080.

Almost surely, 2^129290112 is an apocalyptic number.

129290112 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 129290112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212610840).

129290112 is an abundant number, since it is smaller than the sum of its proper divisors (295931568).

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

129290112 is a wasteful number, since it uses less digits than its factorization.

129290112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16060 (or 16045 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 129290112 is about 11370.5809877948. The cubic root of 129290112 is about 505.6559290263.

The spelling of 129290112 in words is "one hundred twenty-nine million, two hundred ninety thousand, one hundred twelve".