140576561 has 2 divisors, whose sum is σ = 140576562. Its totient is φ = 140576560.

The previous prime is 140576551. The next prime is 140576581. The reversal of 140576561 is 165675041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124456336 + 16120225 = 11156^2 + 4015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140576561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140576551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70288280 + 70288281.

It is an arithmetic number, because the mean of its divisors is an integer number (70288281).

Almost surely, 2^140576561 is an apocalyptic number.

It is an amenable number.

140576561 is a deficient number, since it is larger than the sum of its proper divisors (1).

140576561 is an equidigital number, since it uses as much as digits as its factorization.

140576561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 140576561 is about 11856.4986821574. The cubic root of 140576561 is about 519.9612409474.

The spelling of 140576561 in words is "one hundred forty million, five hundred seventy-six thousand, five hundred sixty-one".