129909246 has 16 divisors (see below), whose sum is σ = 260787600. Its totient is φ = 43141568.

The previous prime is 129909229. The next prime is 129909277. The reversal of 129909246 is 642909921.

It is a junction number, because it is equal to n+sod(n) for n = 129909198 and 129909207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38631 + ... + 41858.

It is an arithmetic number, because the mean of its divisors is an integer number (16299225).

Almost surely, 2^129909246 is an apocalyptic number.

129909246 is an abundant number, since it is smaller than the sum of its proper divisors (130878354).

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

129909246 is a wasteful number, since it uses less digits than its factorization.

129909246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80763.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 129909246 is about 11397.7737299878. The cubic root of 129909246 is about 506.4617920724.

The spelling of 129909246 in words is "one hundred twenty-nine million, nine hundred nine thousand, two hundred forty-six".