1065857565 has 16 divisors (see below), whose sum is σ = 1707337728. Its totient is φ = 567802176.

The previous prime is 1065857549. The next prime is 1065857567. The reversal of 1065857565 is 5657585601.

It is not a de Polignac number, because 1065857565 - 2⁴ = 1065857549 is a prime.

It is a super-2 number, since 2×1065857565² = 2272104697735458450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065857567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27357 + ... + 53666.

It is an arithmetic number, because the mean of its divisors is an integer number (106708608).

Almost surely, 2^1065857565 is an apocalyptic number.

1065857565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1065857565 is a deficient number, since it is larger than the sum of its proper divisors (641480163).

1065857565 is an equidigital number, since it uses as much as digits as its factorization.

1065857565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81908.

The product of its (nonzero) digits is 1260000, while the sum is 48.

The square root of 1065857565 is about 32647.4740983127. The cubic root of 1065857565 is about 1021.4875019105.

The spelling of 1065857565 in words is "one billion, sixty-five million, eight hundred fifty-seven thousand, five hundred sixty-five".