129876901 has 12 divisors (see below), whose sum is σ = 164816640. Its totient is φ = 101202360.

The previous prime is 129876881. The next prime is 129876911. The reversal of 129876901 is 109678921.

It is not a de Polignac number, because 129876901 - 2⁹ = 129876389 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129876911) 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 11 ways as a sum of consecutive naturals, for example, 119941 + ... + 121018.

It is an arithmetic number, because the mean of its divisors is an integer number (13734720).

Almost surely, 2^129876901 is an apocalyptic number.

129876901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129876901 is a deficient number, since it is larger than the sum of its proper divisors (34939739).

129876901 is a wasteful number, since it uses less digits than its factorization.

129876901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240984 (or 240977 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 129876901 is about 11396.3547242090. The cubic root of 129876901 is about 506.4197553764.

The spelling of 129876901 in words is "one hundred twenty-nine million, eight hundred seventy-six thousand, nine hundred one".