129241560 has 128 divisors (see below), whose sum is σ = 451630080. Its totient is φ = 28973568.

The previous prime is 129241549. The next prime is 129241589. The reversal of 129241560 is 65142921.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 43069 + ... + 45971.

It is an arithmetic number, because the mean of its divisors is an integer number (3528360).

Almost surely, 2^129241560 is an apocalyptic number.

129241560 is a gapful number since it is divisible by the number (10) 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 129241560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225815040).

129241560 is an abundant number, since it is smaller than the sum of its proper divisors (322388520).

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

129241560 is a wasteful number, since it uses less digits than its factorization.

129241560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 129241560 is about 11368.4458040666. The cubic root of 129241560 is about 505.5926251895.

The spelling of 129241560 in words is "one hundred twenty-nine million, two hundred forty-one thousand, five hundred sixty".