142565561 has 2 divisors, whose sum is σ = 142565562. Its totient is φ = 142565560.

The previous prime is 142565543. The next prime is 142565573. The reversal of 142565561 is 165565241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137921536 + 4644025 = 11744^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 142565561 - 2¹⁰ = 142564537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142565161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71282780 + 71282781.

It is an arithmetic number, because the mean of its divisors is an integer number (71282781).

Almost surely, 2^142565561 is an apocalyptic number.

It is an amenable number.

142565561 is a deficient number, since it is larger than the sum of its proper divisors (1).

142565561 is an equidigital number, since it uses as much as digits as its factorization.

142565561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 35.

The square root of 142565561 is about 11940.0821186456. The cubic root of 142565561 is about 522.4020539374.

The spelling of 142565561 in words is "one hundred forty-two million, five hundred sixty-five thousand, five hundred sixty-one".