1045521065 has 4 divisors (see below), whose sum is σ = 1254625284. Its totient is φ = 836416848.

The previous prime is 1045521053. The next prime is 1045521067. The reversal of 1045521065 is 5601255401.

It is a happy number.

1045521065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5601255401 = 7 ⋅800179343.

It can be written as a sum of positive squares in 2 ways, for example, as 760215184 + 285305881 = 27572^2 + 16891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045521065 - 2¹⁶ = 1045455529 is a prime.

It is a super-2 number, since 2×1045521065² = 2186228594717468450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045521067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104552102 + ... + 104552111.

It is an arithmetic number, because the mean of its divisors is an integer number (313656321).

Almost surely, 2^1045521065 is an apocalyptic number.

It is an amenable number.

1045521065 is a deficient number, since it is larger than the sum of its proper divisors (209104219).

1045521065 is an equidigital number, since it uses as much as digits as its factorization.

1045521065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209104218.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 1045521065 is about 32334.5181655766. The cubic root of 1045521065 is about 1014.9490991809.

Adding to 1045521065 its reverse (5601255401), we get a palindrome (6646776466).

The spelling of 1045521065 in words is "one billion, forty-five million, five hundred twenty-one thousand, sixty-five".