411871561 has 2 divisors, whose sum is σ = 411871562. Its totient is φ = 411871560.

The previous prime is 411871547. The next prime is 411871583. The reversal of 411871561 is 165178114.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377719225 + 34152336 = 19435^2 + 5844^2 .

It is a cyclic number.

It is not a de Polignac number, because 411871561 - 2¹⁵ = 411838793 is a prime.

It is not a weakly prime, because it can be changed into another prime (411871591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205935780 + 205935781.

It is an arithmetic number, because the mean of its divisors is an integer number (205935781).

Almost surely, 2^411871561 is an apocalyptic number.

It is an amenable number.

411871561 is a deficient number, since it is larger than the sum of its proper divisors (1).

411871561 is an equidigital number, since it uses as much as digits as its factorization.

411871561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 34.

The square root of 411871561 is about 20294.6190158869. The cubic root of 411871561 is about 744.0245546536.

The spelling of 411871561 in words is "four hundred eleven million, eight hundred seventy-one thousand, five hundred sixty-one".