1245824081 has 2 divisors, whose sum is σ = 1245824082. Its totient is φ = 1245824080.

The previous prime is 1245824029. The next prime is 1245824087. The reversal of 1245824081 is 1804285421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239673681 + 6150400 = 35209^2 + 2480^2 .

It is an emirp because it is prime and its reverse (1804285421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245824081 - 2²² = 1241629777 is a prime.

It is a super-2 number, since 2×1245824081² = 3104155281598989122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245824087) 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, 622912040 + 622912041.

It is an arithmetic number, because the mean of its divisors is an integer number (622912041).

Almost surely, 2^1245824081 is an apocalyptic number.

It is an amenable number.

1245824081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245824081 is an equidigital number, since it uses as much as digits as its factorization.

1245824081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 1245824081 is about 35296.2332409565. The cubic root of 1245824081 is about 1076.0164407529.

The spelling of 1245824081 in words is "one billion, two hundred forty-five million, eight hundred twenty-four thousand, eighty-one".