1306242565 has 32 divisors (see below), whose sum is σ = 1677459456. Its totient is φ = 974191680.

The previous prime is 1306242559. The next prime is 1306242569. The reversal of 1306242565 is 5652426031.

It is not a de Polignac number, because 1306242565 - 2¹⁷ = 1306111493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1306242565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306242569) 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 in 31 ways as a sum of consecutive naturals, for example, 2069800 + ... + 2070430.

It is an arithmetic number, because the mean of its divisors is an integer number (52420608).

Almost surely, 2^1306242565 is an apocalyptic number.

It is an amenable number.

1306242565 is a deficient number, since it is larger than the sum of its proper divisors (371216891).

1306242565 is a wasteful number, since it uses less digits than its factorization.

1306242565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 1306242565 is about 36141.9778789153. The cubic root of 1306242565 is about 1093.1370406475.

Adding to 1306242565 its reverse (5652426031), we get a palindrome (6958668596).

The spelling of 1306242565 in words is "one billion, three hundred six million, two hundred forty-two thousand, five hundred sixty-five".