1051505489 has 2 divisors, whose sum is σ = 1051505490. Its totient is φ = 1051505488.

The previous prime is 1051505447. The next prime is 1051505491. The reversal of 1051505489 is 9845051501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756250000 + 295255489 = 27500^2 + 17183^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051505489 - 2¹² = 1051501393 is a prime.

It is a super-2 number, since 2×1051505489² = 2211327586794258242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1051505491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1051505989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525752744 + 525752745.

It is an arithmetic number, because the mean of its divisors is an integer number (525752745).

Almost surely, 2^1051505489 is an apocalyptic number.

It is an amenable number.

1051505489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051505489 is an equidigital number, since it uses as much as digits as its factorization.

1051505489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 1051505489 is about 32426.9253707471. The cubic root of 1051505489 is about 1016.8818942105.

The spelling of 1051505489 in words is "one billion, fifty-one million, five hundred five thousand, four hundred eighty-nine".