1212641449 has 2 divisors, whose sum is σ = 1212641450. Its totient is φ = 1212641448.

The previous prime is 1212641411. The next prime is 1212641497. The reversal of 1212641449 is 9441462121.

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., 1204575849 + 8065600 = 34707^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212641449 - 2¹⁵ = 1212608681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212641149) 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, 606320724 + 606320725.

It is an arithmetic number, because the mean of its divisors is an integer number (606320725).

Almost surely, 2^1212641449 is an apocalyptic number.

It is an amenable number.

1212641449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212641449 is an equidigital number, since it uses as much as digits as its factorization.

1212641449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 1212641449 is about 34823.0017229991. The cubic root of 1212641449 is about 1066.3770820119.

It can be divided in two parts, 121264144 and 9, that multiplied together give a square (1091377296 = 33036²).

The spelling of 1212641449 in words is "one billion, two hundred twelve million, six hundred forty-one thousand, four hundred forty-nine".