1291229 has 2 divisors, whose sum is σ = 1291230. Its totient is φ = 1291228.

The previous prime is 1291223. The next prime is 1291249. The reversal of 1291229 is 9221921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 643204 = 805^2 + 802^2 .

It is an emirp because it is prime and its reverse (9221921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1291229 - 2¹² = 1287133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1291198 and 1291207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1291223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645614 + 645615.

It is an arithmetic number, because the mean of its divisors is an integer number (645615).

2^1291229 is an apocalyptic number.

It is an amenable number.

1291229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291229 is an equidigital number, since it uses as much as digits as its factorization.

1291229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 1291229 is about 1136.3225774401. The cubic root of 1291229 is about 108.8932827526.

The spelling of 1291229 in words is "one million, two hundred ninety-one thousand, two hundred twenty-nine".