1211243459 has 2 divisors, whose sum is σ = 1211243460. Its totient is φ = 1211243458.

The previous prime is 1211243413. The next prime is 1211243461. The reversal of 1211243459 is 9543421121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211243459 is a prime.

It is a super-2 number, since 2×1211243459² = 2934221433940569362, which contains 22 as substring.

Together with 1211243461, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1211213459) 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, 605621729 + 605621730.

It is an arithmetic number, because the mean of its divisors is an integer number (605621730).

Almost surely, 2^1211243459 is an apocalyptic number.

1211243459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211243459 is an equidigital number, since it uses as much as digits as its factorization.

1211243459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 1211243459 is about 34802.9231387250. The cubic root of 1211243459 is about 1065.9671345792.

The spelling of 1211243459 in words is "one billion, two hundred eleven million, two hundred forty-three thousand, four hundred fifty-nine".