1161228605 has 16 divisors (see below), whose sum is σ = 1553100480. Its totient is φ = 828317952.

The previous prime is 1161228589. The next prime is 1161228637. The reversal of 1161228605 is 5068221611.

It is a cyclic number.

It is not a de Polignac number, because 1161228605 - 2⁴ = 1161228589 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 357899 + ... + 361128.

It is an arithmetic number, because the mean of its divisors is an integer number (97068780).

Almost surely, 2^1161228605 is an apocalyptic number.

It is an amenable number.

1161228605 is a deficient number, since it is larger than the sum of its proper divisors (391871875).

1161228605 is a wasteful number, since it uses less digits than its factorization.

1161228605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719068.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1161228605 is about 34076.8045010092. The cubic root of 1161228605 is about 1051.0883967338.

The spelling of 1161228605 in words is "one billion, one hundred sixty-one million, two hundred twenty-eight thousand, six hundred five".