1126579921 has 2 divisors, whose sum is σ = 1126579922. Its totient is φ = 1126579920.

The previous prime is 1126579891. The next prime is 1126579943. The reversal of 1126579921 is 1299756211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118233600 + 8346321 = 33440^2 + 2889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1126579921 - 2¹¹ = 1126577873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1126579991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563289960 + 563289961.

It is an arithmetic number, because the mean of its divisors is an integer number (563289961).

Almost surely, 2^1126579921 is an apocalyptic number.

It is an amenable number.

1126579921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1126579921 is an equidigital number, since it uses as much as digits as its factorization.

1126579921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 43.

The square root of 1126579921 is about 33564.5634710181. The cubic root of 1126579921 is about 1040.5285531382.

The spelling of 1126579921 in words is "one billion, one hundred twenty-six million, five hundred seventy-nine thousand, nine hundred twenty-one".