1231229 has 2 divisors, whose sum is σ = 1231230. Its totient is φ = 1231228.

The previous prime is 1231207. The next prime is 1231231. The reversal of 1231229 is 9221321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 996004 + 235225 = 998^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231229 - 2¹² = 1227133 is a prime.

Together with 1231231, 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 1231229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615614 + 615615.

It is an arithmetic number, because the mean of its divisors is an integer number (615615).

2^1231229 is an apocalyptic number.

It is an amenable number.

1231229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231229 is an equidigital number, since it uses as much as digits as its factorization.

1231229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 1231229 is about 1109.6075882942. The cubic root of 1231229 is about 107.1798007628.

The spelling of 1231229 in words is "one million, two hundred thirty-one thousand, two hundred twenty-nine".