142561073 has 2 divisors, whose sum is σ = 142561074. Its totient is φ = 142561072.

The previous prime is 142561057. The next prime is 142561091. The reversal of 142561073 is 370165241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109579024 + 32982049 = 10468^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 142561073 - 2⁴ = 142561057 is a prime.

It is a super-2 number, since 2×142561073² = 40647319069822658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142561873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71280536 + 71280537.

It is an arithmetic number, because the mean of its divisors is an integer number (71280537).

Almost surely, 2^142561073 is an apocalyptic number.

It is an amenable number.

142561073 is a deficient number, since it is larger than the sum of its proper divisors (1).

142561073 is an equidigital number, since it uses as much as digits as its factorization.

142561073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 142561073 is about 11939.8941787605. The cubic root of 142561073 is about 522.3965720968.

The spelling of 142561073 in words is "one hundred forty-two million, five hundred sixty-one thousand, seventy-three".