1224001291 has 2 divisors, whose sum is σ = 1224001292. Its totient is φ = 1224001290.

The previous prime is 1224001279. The next prime is 1224001349. The reversal of 1224001291 is 1921004221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1224001291 - 2¹⁵ = 1223968523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224001201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612000645 + 612000646.

It is an arithmetic number, because the mean of its divisors is an integer number (612000646).

Almost surely, 2^1224001291 is an apocalyptic number.

1224001291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224001291 is an equidigital number, since it uses as much as digits as its factorization.

1224001291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1224001291 is about 34985.7298194564. The cubic root of 1224001291 is about 1069.6966243310.

The spelling of 1224001291 in words is "one billion, two hundred twenty-four million, one thousand, two hundred ninety-one".