129052137 has 8 divisors (see below), whose sum is σ = 172154080. Its totient is φ = 85992480.

The previous prime is 129052127. The next prime is 129052171. The reversal of 129052137 is 731250921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129052137 - 2¹⁸ = 128789993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129052127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2587 + ... + 16272.

It is an arithmetic number, because the mean of its divisors is an integer number (21519260).

Almost surely, 2^129052137 is an apocalyptic number.

It is an amenable number.

129052137 is a deficient number, since it is larger than the sum of its proper divisors (43101943).

129052137 is a wasteful number, since it uses less digits than its factorization.

129052137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21143.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 129052137 is about 11360.1116631836. Note that the first 3 decimals coincide. The cubic root of 129052137 is about 505.3454969983.

The spelling of 129052137 in words is "one hundred twenty-nine million, fifty-two thousand, one hundred thirty-seven".