142119181 has 2 divisors, whose sum is σ = 142119182. Its totient is φ = 142119180.

The previous prime is 142119179. The next prime is 142119287. The reversal of 142119181 is 181911241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113763556 + 28355625 = 10666^2 + 5325^2 .

It is a cyclic number.

It is not a de Polignac number, because 142119181 - 2¹ = 142119179 is a prime.

It is a super-2 number, since 2×142119181² = 40395723216221522, which contains 22 as substring.

Together with 142119179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142119121) 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, 71059590 + 71059591.

It is an arithmetic number, because the mean of its divisors is an integer number (71059591).

Almost surely, 2^142119181 is an apocalyptic number.

It is an amenable number.

142119181 is a deficient number, since it is larger than the sum of its proper divisors (1).

142119181 is an equidigital number, since it uses as much as digits as its factorization.

142119181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 28.

The square root of 142119181 is about 11921.3749626459. The cubic root of 142119181 is about 521.8562614664.

It can be divided in two parts, 1421 and 19181, that added together give a palindrome (20602).

The spelling of 142119181 in words is "one hundred forty-two million, one hundred nineteen thousand, one hundred eighty-one".