1065521015 has 16 divisors (see below), whose sum is σ = 1377710208. Its totient is φ = 786429696.

The previous prime is 1065520993. The next prime is 1065521021. The reversal of 1065521015 is 5101255601.

It is not a de Polignac number, because 1065521015 - 2²⁸ = 797085559 is a prime.

It is a super-2 number, since 2×1065521015² = 2270670066813260450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177554 + ... + 183456.

It is an arithmetic number, because the mean of its divisors is an integer number (86106888).

Almost surely, 2^1065521015 is an apocalyptic number.

1065521015 is a deficient number, since it is larger than the sum of its proper divisors (312189193).

1065521015 is a wasteful number, since it uses less digits than its factorization.

1065521015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8698.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 1065521015 is about 32642.3193875680. The cubic root of 1065521015 is about 1021.3799772843.

Adding to 1065521015 its reverse (5101255601), we get a palindrome (6166776616).

The spelling of 1065521015 in words is "one billion, sixty-five million, five hundred twenty-one thousand, fifteen".