47172 has 12 divisors (see below), whose sum is σ = 110096. Its totient is φ = 15720.

The previous prime is 47161. The next prime is 47189. The reversal of 47172 is 27174.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

It is an unprimeable number.

47172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954 + ... + 1977.

2⁴⁷¹⁷² is an apocalyptic number.

It is an amenable number.

47172 is an abundant number, since it is smaller than the sum of its proper divisors (62924).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55048).

47172 is a wasteful number, since it uses less digits than its factorization.

47172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938 (or 3936 counting only the distinct ones).

The product of its digits is 392, while the sum is 21.

The square root of 47172 is about 217.1911600411. The cubic root of 47172 is about 36.1322297683.

The spelling of 47172 in words is "forty-seven thousand, one hundred seventy-two", and thus it is an iban number.