1225041449 has 2 divisors, whose sum is σ = 1225041450. Its totient is φ = 1225041448.

The previous prime is 1225041443. The next prime is 1225041457. The reversal of 1225041449 is 9441405221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 969201424 + 255840025 = 31132^2 + 15995^2 .

It is an emirp because it is prime and its reverse (9441405221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225041449 - 2¹² = 1225037353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225041443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612520724 + 612520725.

It is an arithmetic number, because the mean of its divisors is an integer number (612520725).

Almost surely, 2^1225041449 is an apocalyptic number.

It is an amenable number.

1225041449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225041449 is an equidigital number, since it uses as much as digits as its factorization.

1225041449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1225041449 is about 35000.5921235627. The cubic root of 1225041449 is about 1069.9995484320. Note that the first 3 decimals are identical.

The spelling of 1225041449 in words is "one billion, two hundred twenty-five million, forty-one thousand, four hundred forty-nine".