1126355491 has 2 divisors, whose sum is σ = 1126355492. Its totient is φ = 1126355490.

The previous prime is 1126355479. The next prime is 1126355521. The reversal of 1126355491 is 1945536211.

It is a weak prime.

It is an emirp because it is prime and its reverse (1945536211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1126355491 - 2¹⁵ = 1126322723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1126355491.

It is not a weakly prime, because it can be changed into another prime (1126353491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563177745 + 563177746.

It is an arithmetic number, because the mean of its divisors is an integer number (563177746).

Almost surely, 2^1126355491 is an apocalyptic number.

1126355491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1126355491 is an equidigital number, since it uses as much as digits as its factorization.

1126355491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 37.

The square root of 1126355491 is about 33561.2200463571. The cubic root of 1126355491 is about 1040.4594527493.

The spelling of 1126355491 in words is "one billion, one hundred twenty-six million, three hundred fifty-five thousand, four hundred ninety-one".