129687201 has 48 divisors (see below), whose sum is σ = 219613056. Its totient is φ = 72223488.

The previous prime is 129687199. The next prime is 129687253. The reversal of 129687201 is 102786921.

It is not a de Polignac number, because 129687201 - 2¹ = 129687199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129683201) 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 47 ways as a sum of consecutive naturals, for example, 749551 + ... + 749723.

It is an arithmetic number, because the mean of its divisors is an integer number (4575272).

Almost surely, 2^129687201 is an apocalyptic number.

It is an amenable number.

129687201 is a deficient number, since it is larger than the sum of its proper divisors (89925855).

129687201 is a wasteful number, since it uses less digits than its factorization.

129687201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 129687201 is about 11388.0288461173. The cubic root of 129687201 is about 506.1730739996.

The spelling of 129687201 in words is "one hundred twenty-nine million, six hundred eighty-seven thousand, two hundred one".