1205605411 has 2 divisors, whose sum is σ = 1205605412. Its totient is φ = 1205605410.

The previous prime is 1205605409. The next prime is 1205605417. The reversal of 1205605411 is 1145065021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205605411 - 2¹ = 1205605409 is a prime.

Together with 1205605409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1205605417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602802705 + 602802706.

It is an arithmetic number, because the mean of its divisors is an integer number (602802706).

Almost surely, 2^1205605411 is an apocalyptic number.

1205605411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205605411 is an equidigital number, since it uses as much as digits as its factorization.

1205605411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1205605411 is about 34721.8290272848. The cubic root of 1205605411 is about 1064.3106211806.

The spelling of 1205605411 in words is "one billion, two hundred five million, six hundred five thousand, four hundred eleven".