172026129 has 16 divisors (see below), whose sum is σ = 252702144. Its totient is φ = 103224000.

The previous prime is 172026109. The next prime is 172026139. The reversal of 172026129 is 921620271.

It is not a de Polignac number, because 172026129 - 2⁵ = 172026097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172026096 and 172026105.

It is not an unprimeable number, because it can be changed into a prime (172026109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22474 + ... + 29139.

It is an arithmetic number, because the mean of its divisors is an integer number (15793884).

Almost surely, 2^172026129 is an apocalyptic number.

It is an amenable number.

172026129 is a deficient number, since it is larger than the sum of its proper divisors (80676015).

172026129 is a wasteful number, since it uses less digits than its factorization.

172026129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51728.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 172026129 is about 13115.8731695606. The cubic root of 172026129 is about 556.1579363017.

The spelling of 172026129 in words is "one hundred seventy-two million, twenty-six thousand, one hundred twenty-nine".