129857874 has 8 divisors (see below), whose sum is σ = 259715760. Its totient is φ = 43285956.

The previous prime is 129857873. The next prime is 129857891. The reversal of 129857874 is 478758921.

It is a sphenic number, since it is the product of 3 distinct primes.

129857874 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (129857873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10821484 + ... + 10821495.

It is an arithmetic number, because the mean of its divisors is an integer number (32464470).

Almost surely, 2^129857874 is an apocalyptic number.

129857874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129857874 is a wasteful number, since it uses less digits than its factorization.

129857874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21642984.

The product of its digits is 1128960, while the sum is 51.

The square root of 129857874 is about 11395.5199091573. The cubic root of 129857874 is about 506.3950239597.

The spelling of 129857874 in words is "one hundred twenty-nine million, eight hundred fifty-seven thousand, eight hundred seventy-four".