141956561 has 2 divisors, whose sum is σ = 141956562. Its totient is φ = 141956560.

The previous prime is 141956489. The next prime is 141956587. The reversal of 141956561 is 165659141.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 65918161 = 8720^2 + 8119^2 .

It is an emirp because it is prime and its reverse (165659141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 141956561 - 2²² = 137762257 is a prime.

It is not a weakly prime, because it can be changed into another prime (141956861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70978280 + 70978281.

It is an arithmetic number, because the mean of its divisors is an integer number (70978281).

Almost surely, 2^141956561 is an apocalyptic number.

It is an amenable number.

141956561 is a deficient number, since it is larger than the sum of its proper divisors (1).

141956561 is an equidigital number, since it uses as much as digits as its factorization.

141956561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 141956561 is about 11914.5524884487. The cubic root of 141956561 is about 521.6571406677.

The spelling of 141956561 in words is "one hundred forty-one million, nine hundred fifty-six thousand, five hundred sixty-one".