129123260 has 24 divisors (see below), whose sum is σ = 309896160. Its totient is φ = 44270784.

The previous prime is 129123257. The next prime is 129123263. The reversal of 129123260 is 62321921.

It is an interprime number because it is at equal distance from previous prime (129123257) and next prime (129123263).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129123263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461015 + ... + 461294.

It is an arithmetic number, because the mean of its divisors is an integer number (12912340).

Almost surely, 2^129123260 is an apocalyptic number.

129123260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129123260 is an abundant number, since it is smaller than the sum of its proper divisors (180772900).

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

129123260 is a wasteful number, since it uses less digits than its factorization.

129123260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922325 (or 922323 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 129123260 is about 11363.2416149618. The cubic root of 129123260 is about 505.4383150069.

The spelling of 129123260 in words is "one hundred twenty-nine million, one hundred twenty-three thousand, two hundred sixty".