142666219 has 2 divisors, whose sum is σ = 142666220. Its totient is φ = 142666218.

The previous prime is 142666213. The next prime is 142666259. The reversal of 142666219 is 912666241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142666219 - 2¹³ = 142658027 is a prime.

It is a super-2 number, since 2×142666219² = 40707300087511922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142666213) 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, 71333109 + 71333110.

It is an arithmetic number, because the mean of its divisors is an integer number (71333110).

Almost surely, 2^142666219 is an apocalyptic number.

142666219 is a deficient number, since it is larger than the sum of its proper divisors (1).

142666219 is an equidigital number, since it uses as much as digits as its factorization.

142666219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 142666219 is about 11944.2965050270. The cubic root of 142666219 is about 522.5249718306.

The spelling of 142666219 in words is "one hundred forty-two million, six hundred sixty-six thousand, two hundred nineteen".