11227861 has 2 divisors, whose sum is σ = 11227862. Its totient is φ = 11227860.

The previous prime is 11227849. The next prime is 11227883. The reversal of 11227861 is 16872211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7187761 + 4040100 = 2681^2 + 2010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11227861 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11227961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5613930 + 5613931.

It is an arithmetic number, because the mean of its divisors is an integer number (5613931).

Almost surely, 2^11227861 is an apocalyptic number.

It is an amenable number.

11227861 is a deficient number, since it is larger than the sum of its proper divisors (1).

11227861 is an equidigital number, since it uses as much as digits as its factorization.

11227861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 28.

The square root of 11227861 is about 3350.8000537185. The cubic root of 11227861 is about 223.9231573690.

The spelling of 11227861 in words is "eleven million, two hundred twenty-seven thousand, eight hundred sixty-one".