1126781 has 2 divisors, whose sum is σ = 1126782. Its totient is φ = 1126780.

The previous prime is 1126771. The next prime is 1126787. The reversal of 1126781 is 1876211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 502681 = 790^2 + 709^2 .

It is an emirp because it is prime and its reverse (1876211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1126781 - 2¹⁴ = 1110397 is a prime.

It is a super-2 number, since 2×1126781² = 2539270843922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1126781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1126787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563390 + 563391.

It is an arithmetic number, because the mean of its divisors is an integer number (563391).

2^1126781 is an apocalyptic number.

It is an amenable number.

1126781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1126781 is an equidigital number, since it uses as much as digits as its factorization.

1126781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 1126781 is about 1061.4994112104. The cubic root of 1126781 is about 104.0590456127.

The spelling of 1126781 in words is "one million, one hundred twenty-six thousand, seven hundred eighty-one".