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172271 = 1115661
BaseRepresentation
bin101010000011101111
322202022102
4222003233
521003041
63405315
71315151
oct520357
9282272
10172271
11108480
128383b
1360548
153609b
hex2a0ef

172271 has 4 divisors (see below), whose sum is σ = 187944. Its totient is φ = 156600.

The previous prime is 172259. The next prime is 172279.

172271 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 172271 - 214 = 155887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7820 + ... + 7841.

It is an arithmetic number, because the mean of its divisors is an integer number (46986).

2172271 is an apocalyptic number.

172271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172271 is a deficient number, since it is larger than the sum of its proper divisors (15673).

172271 is a wasteful number, since it uses less digits than its factorization.

172271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15672.

The product of its digits is 196, while the sum is 20.

The square root of 172271 is about 415.0554179866. The cubic root of 172271 is about 55.6421699300.

The spelling of 172271 in words is "one hundred seventy-two thousand, two hundred seventy-one", and thus it is an iban number.

Divisors: 1 11 15661 172271