1011445249 has 2 divisors, whose sum is σ = 1011445250. Its totient is φ = 1011445248.

The previous prime is 1011445247. The next prime is 1011445289. The reversal of 1011445249 is 9425441101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 989542849 + 21902400 = 31457^2 + 4680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011445249 - 2¹ = 1011445247 is a prime.

Together with 1011445247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1011445249.

It is not a weakly prime, because it can be changed into another prime (1011445241) 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, 505722624 + 505722625.

It is an arithmetic number, because the mean of its divisors is an integer number (505722625).

Almost surely, 2^1011445249 is an apocalyptic number.

It is an amenable number.

1011445249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011445249 is an equidigital number, since it uses as much as digits as its factorization.

1011445249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1011445249 is about 31803.2270217976. The cubic root of 1011445249 is about 1003.8006199881.

The spelling of 1011445249 in words is "one billion, eleven million, four hundred forty-five thousand, two hundred forty-nine".