141605561 has 2 divisors, whose sum is σ = 141605562. Its totient is φ = 141605560.

The previous prime is 141605557. The next prime is 141605567. The reversal of 141605561 is 165506141.

141605561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89491600 + 52113961 = 9460^2 + 7219^2 .

It is an emirp because it is prime and its reverse (165506141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141605561 - 2² = 141605557 is a prime.

It is a super-2 number, since 2×141605561² = 40104269812249442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (141605567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70802780 + 70802781.

It is an arithmetic number, because the mean of its divisors is an integer number (70802781).

Almost surely, 2^141605561 is an apocalyptic number.

It is an amenable number.

141605561 is a deficient number, since it is larger than the sum of its proper divisors (1).

141605561 is an equidigital number, since it uses as much as digits as its factorization.

141605561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 141605561 is about 11899.8134859333. The cubic root of 141605561 is about 521.2268381997.

The spelling of 141605561 in words is "one hundred forty-one million, six hundred five thousand, five hundred sixty-one".