1166242649 has 12 divisors (see below), whose sum is σ = 1380512868. Its totient is φ = 978663840.

The previous prime is 1166242643. The next prime is 1166242673. The reversal of 1166242649 is 9462426611.

It can be written as a sum of positive squares in 2 ways, for example, as 514972249 + 651270400 = 22693^2 + 25520^2 .

It is not a de Polignac number, because 1166242649 - 2²⁰ = 1165194073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1166242643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369134 + ... + 372279.

It is an arithmetic number, because the mean of its divisors is an integer number (115042739).

Almost surely, 2^1166242649 is an apocalyptic number.

It is an amenable number.

1166242649 is a deficient number, since it is larger than the sum of its proper divisors (214270219).

1166242649 is a wasteful number, since it uses less digits than its factorization.

1166242649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741448 (or 741437 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 1166242649 is about 34150.2950060464. The cubic root of 1166242649 is about 1052.5990485338.

The spelling of 1166242649 in words is "one billion, one hundred sixty-six million, two hundred forty-two thousand, six hundred forty-nine".