142198181 has 2 divisors, whose sum is σ = 142198182. Its totient is φ = 142198180.

The previous prime is 142198169. The next prime is 142198193. The reversal of 142198181 is 181891241.

142198181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (142198169) and next prime (142198193).

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 68392900 = 8591^2 + 8270^2 .

It is a cyclic number.

It is not a de Polignac number, because 142198181 - 2¹⁴ = 142181797 is a prime.

It is a super-2 number, since 2×142198181² = 40440645359417522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142198151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71099090 + 71099091.

It is an arithmetic number, because the mean of its divisors is an integer number (71099091).

Almost surely, 2^142198181 is an apocalyptic number.

It is an amenable number.

142198181 is a deficient number, since it is larger than the sum of its proper divisors (1).

142198181 is an equidigital number, since it uses as much as digits as its factorization.

142198181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 35.

The square root of 142198181 is about 11924.6878785149. The cubic root of 142198181 is about 521.9529385600.

The spelling of 142198181 in words is "one hundred forty-two million, one hundred ninety-eight thousand, one hundred eighty-one".