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BaseRepresentation
bin10001000101110001
310120000122
4101011301
54220001
61300025
7411041
oct210561
9116018
1070001
1148658
1234615
1325b29
141b721
1515b1b
hex11171

70001 has 2 divisors, whose sum is σ = 70002. Its totient is φ = 70000.

The previous prime is 69997. The next prime is 70003. The reversal of 70001 is 10007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 2401 = 260^2 + 49^2 .

It is an emirp because it is prime and its reverse (10007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70001 - 22 = 69997 is a prime.

Together with 70003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70003) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35000 + 35001.

It is an arithmetic number, because the mean of its divisors is an integer number (35001).

270001 is an apocalyptic number.

It is an amenable number.

70001 is a deficient number, since it is larger than the sum of its proper divisors (1).

70001 is an equidigital number, since it uses as much as digits as its factorization.

70001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7, while the sum is 8.

The square root of 70001 is about 264.5770209221. The cubic root of 70001 is about 41.2130492488.

Adding to 70001 its reverse (10007), we get a palindrome (80008).

The spelling of 70001 in words is "seventy thousand, one", and thus it is an iban number.