7126181 has 2 divisors, whose sum is σ = 7126182. Its totient is φ = 7126180.

The previous prime is 7126157. The next prime is 7126183. The reversal of 7126181 is 1816217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4661281 + 2464900 = 2159^2 + 1570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7126181 is a prime.

It is a super-2 number, since 2×7126181² = 101564911289522, which contains 22 as substring.

Together with 7126183, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7126181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7126183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3563090 + 3563091.

It is an arithmetic number, because the mean of its divisors is an integer number (3563091).

Almost surely, 2^7126181 is an apocalyptic number.

It is an amenable number.

7126181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7126181 is an equidigital number, since it uses as much as digits as its factorization.

7126181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 7126181 is about 2669.4907754102. The cubic root of 7126181 is about 192.4356877422.

The spelling of 7126181 in words is "seven million, one hundred twenty-six thousand, one hundred eighty-one".