142565669 has 2 divisors, whose sum is σ = 142565670. Its totient is φ = 142565668.

The previous prime is 142565639. The next prime is 142565671. The reversal of 142565669 is 966565241.

142565669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90003169 + 52562500 = 9487^2 + 7250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142565669 is a prime.

It is a super-2 number, since 2×142565669² = 40649939954835122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 142565671, it forms a pair of twin primes.

It is a Chen 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 (142565609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71282834 + 71282835.

It is an arithmetic number, because the mean of its divisors is an integer number (71282835).

Almost surely, 2^142565669 is an apocalyptic number.

It is an amenable number.

142565669 is a deficient number, since it is larger than the sum of its proper divisors (1).

142565669 is an equidigital number, since it uses as much as digits as its factorization.

142565669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 142565669 is about 11940.0866412267. The cubic root of 142565669 is about 522.4021858519.

The spelling of 142565669 in words is "one hundred forty-two million, five hundred sixty-five thousand, six hundred sixty-nine".