129881562 has 8 divisors (see below), whose sum is σ = 259763136. Its totient is φ = 43293852.

The previous prime is 129881561. The next prime is 129881603. The reversal of 129881562 is 265188921.

It is a happy number.

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

129881562 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (129881561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10823458 + ... + 10823469.

It is an arithmetic number, because the mean of its divisors is an integer number (32470392).

Almost surely, 2^129881562 is an apocalyptic number.

129881562 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.

129881562 is a wasteful number, since it uses less digits than its factorization.

129881562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21646932.

The product of its digits is 69120, while the sum is 42.

The square root of 129881562 is about 11396.5592175884. The cubic root of 129881562 is about 506.4258134058.

The spelling of 129881562 in words is "one hundred twenty-nine million, eight hundred eighty-one thousand, five hundred sixty-two".