172071 has 8 divisors (see below), whose sum is σ = 254960. Its totient is φ = 114696.

The previous prime is 172069. The next prime is 172079. The reversal of 172071 is 170271.

It is not a de Polignac number, because 172071 - 2¹ = 172069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3160 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (31870).

2¹⁷²⁰⁷¹ is an apocalyptic number.

172071 is a deficient number, since it is larger than the sum of its proper divisors (82889).

172071 is an equidigital number, since it uses as much as digits as its factorization.

172071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6382 (or 6376 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 172071 is about 414.8144163358. The cubic root of 172071 is about 55.6206287858.

The spelling of 172071 in words is "one hundred seventy-two thousand, seventy-one", and thus it is an iban number.