129971402 has 16 divisors (see below), whose sum is σ = 214672032. Its totient is φ = 58524720.

The previous prime is 129971399. The next prime is 129971407. The reversal of 129971402 is 204179921.

It is not an unprimeable number, because it can be changed into a prime (129971407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25253 + ... + 29960.

It is an arithmetic number, because the mean of its divisors is an integer number (13417002).

Almost surely, 2^129971402 is an apocalyptic number.

129971402 is a deficient number, since it is larger than the sum of its proper divisors (84700630).

129971402 is a wasteful number, since it uses less digits than its factorization.

129971402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55333.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 129971402 is about 11400.5000767510. The cubic root of 129971402 is about 506.5425526056.

The spelling of 129971402 in words is "one hundred twenty-nine million, nine hundred seventy-one thousand, four hundred two".