1205605151 has 16 divisors (see below), whose sum is σ = 1267282368. Its totient is φ = 1145664000.

The previous prime is 1205605127. The next prime is 1205605153. The reversal of 1205605151 is 1515065021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205605151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1205605151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205605153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471326 + ... + 473876.

It is an arithmetic number, because the mean of its divisors is an integer number (79205148).

Almost surely, 2^1205605151 is an apocalyptic number.

1205605151 is a deficient number, since it is larger than the sum of its proper divisors (61677217).

1205605151 is a wasteful number, since it uses less digits than its factorization.

1205605151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 1205605151 is about 34721.8252832422. The cubic root of 1205605151 is about 1064.3105446711.

The spelling of 1205605151 in words is "one billion, two hundred five million, six hundred five thousand, one hundred fifty-one".