142043669 has 2 divisors, whose sum is σ = 142043670. Its totient is φ = 142043668.

The previous prime is 142043651. The next prime is 142043689. The reversal of 142043669 is 966340241.

142043669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76352644 + 65691025 = 8738^2 + 8105^2 .

It is an emirp because it is prime and its reverse (966340241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142043669 - 2⁸ = 142043413 is a prime.

It is a super-2 number, since 2×142043669² = 40352807805963122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142043689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71021834 + 71021835.

It is an arithmetic number, because the mean of its divisors is an integer number (71021835).

Almost surely, 2^142043669 is an apocalyptic number.

It is an amenable number.

142043669 is a deficient number, since it is larger than the sum of its proper divisors (1).

142043669 is an equidigital number, since it uses as much as digits as its factorization.

142043669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 142043669 is about 11918.2074574996. The cubic root of 142043669 is about 521.7638193553.

The spelling of 142043669 in words is "one hundred forty-two million, forty-three thousand, six hundred sixty-nine".