129541396 has 12 divisors (see below), whose sum is σ = 226824948. Its totient is φ = 64734272.

The previous prime is 129541393. The next prime is 129541421. The reversal of 129541396 is 693145921.

It can be written as a sum of positive squares in 2 ways, for example, as 45562500 + 83978896 = 6750^2 + 9164^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129541393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 16096.

It is an arithmetic number, because the mean of its divisors is an integer number (18902079).

Almost surely, 2^129541396 is an apocalyptic number.

It is an amenable number.

129541396 is a deficient number, since it is larger than the sum of its proper divisors (97283552).

129541396 is a wasteful number, since it uses less digits than its factorization.

129541396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18218 (or 18216 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 129541396 is about 11381.6253672312. The cubic root of 129541396 is about 505.9833090882.

The spelling of 129541396 in words is "one hundred twenty-nine million, five hundred forty-one thousand, three hundred ninety-six".