172671129 has 8 divisors (see below), whose sum is σ = 255809120. Its totient is φ = 115114068.

The previous prime is 172671113. The next prime is 172671167. The reversal of 172671129 is 921176271.

It is a happy number.

It is not a de Polignac number, because 172671129 - 2⁴ = 172671113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172671093 and 172671102.

It is not an unprimeable number, because it can be changed into a prime (172671199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3197587 + ... + 3197640.

It is an arithmetic number, because the mean of its divisors is an integer number (31976140).

Almost surely, 2^172671129 is an apocalyptic number.

It is an amenable number.

172671129 is a deficient number, since it is larger than the sum of its proper divisors (83137991).

172671129 is an equidigital number, since it uses as much as digits as its factorization.

172671129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395236 (or 6395230 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 172671129 is about 13140.4386913071. The cubic root of 172671129 is about 556.8521612010.

The spelling of 172671129 in words is "one hundred seventy-two million, six hundred seventy-one thousand, one hundred twenty-nine".