172026 has 24 divisors (see below), whose sum is σ = 393120. Its totient is φ = 54216.

The previous prime is 172021. The next prime is 172027. The reversal of 172026 is 620271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2¹⁷²⁰²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196560).

172026 is an abundant number, since it is smaller than the sum of its proper divisors (221094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172026 is a wasteful number, since it uses less digits than its factorization.

172026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 172026 is about 414.7601716655. The cubic root of 172026 is about 55.6157797283.

Adding to 172026 its reverse (620271), we get a palindrome (792297).

It can be divided in two parts, 1 and 72026, that added together give a palindrome (72027).

The spelling of 172026 in words is "one hundred seventy-two thousand, twenty-six".