129541660 has 12 divisors (see below), whose sum is σ = 272037528. Its totient is φ = 51816656.

The previous prime is 129541631. The next prime is 129541663. The reversal of 129541660 is 66145921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129541663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3238522 + ... + 3238561.

It is an arithmetic number, because the mean of its divisors is an integer number (22669794).

Almost surely, 2^129541660 is an apocalyptic number.

129541660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129541660 is an abundant number, since it is smaller than the sum of its proper divisors (142495868).

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

129541660 is a wasteful number, since it uses less digits than its factorization.

129541660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6477092 (or 6477090 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 129541660 is about 11381.6369648658. The cubic root of 129541660 is about 505.9836528123.

The spelling of 129541660 in words is "one hundred twenty-nine million, five hundred forty-one thousand, six hundred sixty".