7100081 has 2 divisors, whose sum is σ = 7100082. Its totient is φ = 7100080.

The previous prime is 7100063. The next prime is 7100083. The reversal of 7100081 is 1800017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 2835856 = 2065^2 + 1684^2 .

It is an emirp because it is prime and its reverse (1800017) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7100081 - 2⁶ = 7100017 is a prime.

It is a super-2 number, since 2×7100081² = 100822300413122, which contains 22 as substring.

Together with 7100083, 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 (7100083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3550040 + 3550041.

It is an arithmetic number, because the mean of its divisors is an integer number (3550041).

Almost surely, 2^7100081 is an apocalyptic number.

It is an amenable number.

7100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7100081 is an equidigital number, since it uses as much as digits as its factorization.

7100081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 7100081 is about 2664.5977182307. The cubic root of 7100081 is about 192.2004651751.

Adding to 7100081 its reverse (1800017), we get a palindrome (8900098).

The spelling of 7100081 in words is "seven million, one hundred thousand, eighty-one".