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71971 is a prime number
BaseRepresentation
bin10001100100100011
310122201121
4101210203
54300341
61313111
7416554
oct214443
9118647
1071971
114a089
1235797
13269b3
141c32b
15164d1
hex11923

71971 has 2 divisors, whose sum is σ = 71972. Its totient is φ = 71970.

The previous prime is 71963. The next prime is 71983. The reversal of 71971 is 17917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71971 - 23 = 71963 is a prime.

It is not a weakly prime, because it can be changed into another prime (71941) 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 as a sum of consecutive naturals, namely, 35985 + 35986.

It is an arithmetic number, because the mean of its divisors is an integer number (35986).

271971 is an apocalyptic number.

71971 is a deficient number, since it is larger than the sum of its proper divisors (1).

71971 is an equidigital number, since it uses as much as digits as its factorization.

71971 is an odious number, because the sum of its binary digits is odd.

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

The square root of 71971 is about 268.2741135481. The cubic root of 71971 is about 41.5960903007.

The spelling of 71971 in words is "seventy-one thousand, nine hundred seventy-one".