129946100 has 36 divisors (see below), whose sum is σ = 291713100. Its totient is φ = 50184960.

The previous prime is 129946093. The next prime is 129946121. The reversal of 129946100 is 1649921.

It can be written as a sum of positive squares in 6 ways, for example, as 77284 + 129868816 = 278^2 + 11396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19505 + ... + 25304.

Almost surely, 2^129946100 is an apocalyptic number.

129946100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129946100 is an abundant number, since it is smaller than the sum of its proper divisors (161767000).

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

129946100 is a wasteful number, since it uses less digits than its factorization.

129946100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44852 (or 44845 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 129946100 is about 11399.3903345749. The cubic root of 129946100 is about 506.5096803192.

The spelling of 129946100 in words is "one hundred twenty-nine million, nine hundred forty-six thousand, one hundred".