11871229 has 2 divisors, whose sum is σ = 11871230. Its totient is φ = 11871228.

The previous prime is 11871227. The next prime is 11871259. The reversal of 11871229 is 92217811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7851204 + 4020025 = 2802^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 11871229 - 2¹ = 11871227 is a prime.

Together with 11871227, it forms a pair of twin primes.

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 11871229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11871221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5935614 + 5935615.

It is an arithmetic number, because the mean of its divisors is an integer number (5935615).

Almost surely, 2^11871229 is an apocalyptic number.

It is an amenable number.

11871229 is a deficient number, since it is larger than the sum of its proper divisors (1).

11871229 is an equidigital number, since it uses as much as digits as its factorization.

11871229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 31.

The square root of 11871229 is about 3445.4649903895. The cubic root of 11871229 is about 228.1209794500.

It can be divided in two parts, 11871 and 229, that added together give a square (12100 = 110²).

The spelling of 11871229 in words is "eleven million, eight hundred seventy-one thousand, two hundred twenty-nine".