1065160561 has 4 divisors (see below), whose sum is σ = 1065516400. Its totient is φ = 1064804724.

The previous prime is 1065160559. The next prime is 1065160601. The reversal of 1065160561 is 1650615601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1065160561 - 2¹ = 1065160559 is a prime.

It is a super-2 number, since 2×1065160561² = 2269134041419669442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065160861) 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, 173391 + ... + 179428.

It is an arithmetic number, because the mean of its divisors is an integer number (266379100).

Almost surely, 2^1065160561 is an apocalyptic number.

It is an amenable number.

1065160561 is a deficient number, since it is larger than the sum of its proper divisors (355839).

1065160561 is an equidigital number, since it uses as much as digits as its factorization.

1065160561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355838.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1065160561 is about 32636.7976523433. The cubic root of 1065160561 is about 1021.2647904365.

The spelling of 1065160561 in words is "one billion, sixty-five million, one hundred sixty thousand, five hundred sixty-one".