• 172 can be written using four 4's:

See also 113.

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172 has 6 divisors (see below), whose sum is σ = 308. Its totient is φ = 84.

The previous prime is 167. The next prime is 173. The reversal of 172 is 271.

172 is nontrivially palindromic in base 6.

172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a magnanimous number.

It is a pancake number, because a pancake can be divided into 172 parts by 18 straight cuts.

172 is a nontrivial repdigit in base 6.

It is a plaindrome in base 6, base 7, base 11, base 12 and base 16.

It is a nialpdrome in base 6, base 9, base 14 and base 15.

It is a zygodrome in base 6.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18 + ... + 25.

It is an amenable number.

172 is a deficient number, since it is larger than the sum of its proper divisors (136).

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

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

The sum of its prime factors is 47 (or 45 counting only the distinct ones).

The product of its digits is 14, while the sum is 10.

The square root of 172 is about 13.1148770486. The cubic root of 172 is about 5.5612977665.

Subtracting 172 from its reverse (271), we obtain a palindrome (99).

The spelling of 172 in words is "one hundred seventy-two", and thus it is an aban number and an iban number.