1520045509 has 2 divisors, whose sum is σ = 1520045510. Its totient is φ = 1520045508.

The previous prime is 1520045479. The next prime is 1520045539. The reversal of 1520045509 is 9055400251.

It is a balanced prime because it is at equal distance from previous prime (1520045479) and next prime (1520045539).

It can be written as a sum of positive squares in only one way, i.e., 1509089409 + 10956100 = 38847^2 + 3310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1520045509 - 2⁹ = 1520044997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1520045539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760022754 + 760022755.

It is an arithmetic number, because the mean of its divisors is an integer number (760022755).

Almost surely, 2^1520045509 is an apocalyptic number.

It is an amenable number.

1520045509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520045509 is an equidigital number, since it uses as much as digits as its factorization.

1520045509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 1520045509 is about 38987.7610154777. The cubic root of 1520045509 is about 1149.7908905234.

The spelling of 1520045509 in words is "one billion, five hundred twenty million, forty-five thousand, five hundred nine".