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72139 is a prime number
BaseRepresentation
bin10001100111001011
310122221211
4101213023
54302024
61313551
7420214
oct214713
9118854
1072139
114a221
12358b7
1326ab2
141c40b
1516594
hex119cb

72139 has 2 divisors, whose sum is σ = 72140. Its totient is φ = 72138.

The previous prime is 72109. The next prime is 72161. The reversal of 72139 is 93127.

It is an a-pointer prime, because the next prime (72161) can be obtained adding 72139 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72139 - 215 = 39371 is a prime.

72139 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (72109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36069 + 36070.

It is an arithmetic number, because the mean of its divisors is an integer number (36070).

272139 is an apocalyptic number.

72139 is a deficient number, since it is larger than the sum of its proper divisors (1).

72139 is an equidigital number, since it uses as much as digits as its factorization.

72139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 22.

The square root of 72139 is about 268.5870436190. The cubic root of 72139 is about 41.6284307008.

The spelling of 72139 in words is "seventy-two thousand, one hundred thirty-nine".