7152181 has 2 divisors, whose sum is σ = 7152182. Its totient is φ = 7152180.

The previous prime is 7152169. The next prime is 7152203. The reversal of 7152181 is 1812517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421156 + 731025 = 2534^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 7152181 - 2¹¹ = 7150133 is a prime.

It is a super-2 number, since 2×7152181² = 102307386113522, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7152161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576090 + 3576091.

It is an arithmetic number, because the mean of its divisors is an integer number (3576091).

Almost surely, 2^7152181 is an apocalyptic number.

It is an amenable number.

7152181 is a deficient number, since it is larger than the sum of its proper divisors (1).

7152181 is an equidigital number, since it uses as much as digits as its factorization.

7152181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 7152181 is about 2674.3561842058. The cubic root of 7152181 is about 192.6694387174.

Adding to 7152181 its reverse (1812517), we get a palindrome (8964698).

The spelling of 7152181 in words is "seven million, one hundred fifty-two thousand, one hundred eighty-one".