142044169 has 2 divisors, whose sum is σ = 142044170. Its totient is φ = 142044168.

The previous prime is 142044167. The next prime is 142044223. The reversal of 142044169 is 961440241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134861769 + 7182400 = 11613^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 142044169 - 2¹ = 142044167 is a prime.

It is a super-2 number, since 2×142044169² = 40353091893801122, which contains 22 as substring.

Together with 142044167, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 142044169.

It is not a weakly prime, because it can be changed into another prime (142044167) 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, 71022084 + 71022085.

It is an arithmetic number, because the mean of its divisors is an integer number (71022085).

Almost surely, 2^142044169 is an apocalyptic number.

It is an amenable number.

142044169 is a deficient number, since it is larger than the sum of its proper divisors (1).

142044169 is an equidigital number, since it uses as much as digits as its factorization.

142044169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 142044169 is about 11918.2284337900. The cubic root of 142044169 is about 521.7644315652.

The spelling of 142044169 in words is "one hundred forty-two million, forty-four thousand, one hundred sixty-nine".