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71197 = 721453
BaseRepresentation
bin10001011000011101
310121122221
4101120131
54234242
61305341
7414400
oct213035
9117587
1071197
1149545
1235251
1326539
141bd37
1516167
hex1161d

71197 has 6 divisors (see below), whose sum is σ = 82878. Its totient is φ = 60984.

The previous prime is 71191. The next prime is 71209. The reversal of 71197 is 79117.

It can be written as a sum of positive squares in only one way, i.e., 70756 + 441 = 266^2 + 21^2 .

It is not a de Polignac number, because 71197 - 27 = 71069 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 (71191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678 + ... + 775.

It is an arithmetic number, because the mean of its divisors is an integer number (13813).

271197 is an apocalyptic number.

It is an amenable number.

71197 is a deficient number, since it is larger than the sum of its proper divisors (11681).

71197 is a wasteful number, since it uses less digits than its factorization.

71197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1460 counting only the distinct ones).

The product of its digits is 441, while the sum is 25.

The square root of 71197 is about 266.8276597356. The cubic root of 71197 is about 41.4464398319.

Subtracting from 71197 its product of digits (441), we obtain a square (70756 = 2662).

It can be divided in two parts, 711 and 97, that added together give a palindrome (808).

The spelling of 71197 in words is "seventy-one thousand, one hundred ninety-seven".

Divisors: 1 7 49 1453 10171 71197