129621486 has 8 divisors (see below), whose sum is σ = 259242984. Its totient is φ = 43207160.

The previous prime is 129621473. The next prime is 129621493. The reversal of 129621486 is 684126921.

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

129621486 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10801785 + ... + 10801796.

It is an arithmetic number, because the mean of its divisors is an integer number (32405373).

Almost surely, 2^129621486 is an apocalyptic number.

129621486 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.

129621486 is a wasteful number, since it uses less digits than its factorization.

129621486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21603586.

The product of its digits is 41472, while the sum is 39.

The square root of 129621486 is about 11385.1432138555. The cubic root of 129621486 is about 506.0875636762.

The spelling of 129621486 in words is "one hundred twenty-nine million, six hundred twenty-one thousand, four hundred eighty-six".