172226 has 4 divisors (see below), whose sum is σ = 258342. Its totient is φ = 86112.

The previous prime is 172223. The next prime is 172243. The reversal of 172226 is 622271.

It is a Cunningham number, because it is equal to 415²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 172225 + 1 = 415^2 + 1^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172198 and 172207.

It is not an unprimeable number, because it can be changed into a prime (172223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43055 + ... + 43058.

2¹⁷²²²⁶ is an apocalyptic number.

172226 is a deficient number, since it is larger than the sum of its proper divisors (86116).

172226 is an equidigital number, since it uses as much as digits as its factorization.

172226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86115.

The product of its digits is 336, while the sum is 20.

The square root of 172226 is about 415.0012048175. The cubic root of 172226 is about 55.6373246267.

Adding to 172226 its reverse (622271), we get a palindrome (794497).

It can be divided in two parts, 1 and 72226, that added together give a palindrome (72227).

The spelling of 172226 in words is "one hundred seventy-two thousand, two hundred twenty-six".