1126812661 has 24 divisors (see below), whose sum is σ = 1272214440. Its totient is φ = 990931200.

The previous prime is 1126812647. The next prime is 1126812677. The reversal of 1126812661 is 1662186211.

It can be written as a sum of positive squares in 12 ways, for example, as 89586225 + 1037226436 = 9465^2 + 32206^2 .

It is not a de Polignac number, because 1126812661 - 2²³ = 1118424053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126812641) 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 23 ways as a sum of consecutive naturals, for example, 3845631 + ... + 3845923.

It is an arithmetic number, because the mean of its divisors is an integer number (53008935).

Almost surely, 2^1126812661 is an apocalyptic number.

It is an amenable number.

1126812661 is a deficient number, since it is larger than the sum of its proper divisors (145401779).

1126812661 is a wasteful number, since it uses less digits than its factorization.

1126812661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 436 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 1126812661 is about 33568.0303413829. The cubic root of 1126812661 is about 1040.6002024241.

Adding to 1126812661 its reverse (1662186211), we get a palindrome (2788998872).

The spelling of 1126812661 in words is "one billion, one hundred twenty-six million, eight hundred twelve thousand, six hundred sixty-one".