142561057 has 2 divisors, whose sum is σ = 142561058. Its totient is φ = 142561056.

The previous prime is 142561021. The next prime is 142561073. The reversal of 142561057 is 750165241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78304801 + 64256256 = 8849^2 + 8016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142561057 is a prime.

It is not a weakly prime, because it can be changed into another prime (142561457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71280528 + 71280529.

It is an arithmetic number, because the mean of its divisors is an integer number (71280529).

Almost surely, 2^142561057 is an apocalyptic number.

It is an amenable number.

142561057 is a deficient number, since it is larger than the sum of its proper divisors (1).

142561057 is an equidigital number, since it uses as much as digits as its factorization.

142561057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 142561057 is about 11939.8935087378. The cubic root of 142561057 is about 522.3965525535.

The spelling of 142561057 in words is "one hundred forty-two million, five hundred sixty-one thousand, fifty-seven".