1065521263 has 2 divisors, whose sum is σ = 1065521264. Its totient is φ = 1065521262.

The previous prime is 1065521239. The next prime is 1065521293. The reversal of 1065521263 is 3621255601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1065521263 - 2⁵ = 1065521231 is a prime.

It is a super-2 number, since 2×1065521263² = 2270671123810230338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065521203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532760631 + 532760632.

It is an arithmetic number, because the mean of its divisors is an integer number (532760632).

Almost surely, 2^1065521263 is an apocalyptic number.

1065521263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065521263 is an equidigital number, since it uses as much as digits as its factorization.

1065521263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1065521263 is about 32642.3231863175. The cubic root of 1065521263 is about 1021.3800565264.

Adding to 1065521263 its reverse (3621255601), we get a palindrome (4686776864).

The spelling of 1065521263 in words is "one billion, sixty-five million, five hundred twenty-one thousand, two hundred sixty-three".