1065007561 has 2 divisors, whose sum is σ = 1065007562. Its totient is φ = 1065007560.

The previous prime is 1065007547. The next prime is 1065007579. The reversal of 1065007561 is 1657005601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557857161 + 507150400 = 23619^2 + 22520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1065007561 is a prime.

It is a super-2 number, since 2×1065007561² = 2268482209974337442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1065007591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532503780 + 532503781.

It is an arithmetic number, because the mean of its divisors is an integer number (532503781).

Almost surely, 2^1065007561 is an apocalyptic number.

It is an amenable number.

1065007561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065007561 is an equidigital number, since it uses as much as digits as its factorization.

1065007561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 1065007561 is about 32634.4535881942. The cubic root of 1065007561 is about 1021.2158898292.

The spelling of 1065007561 in words is "one billion, sixty-five million, seven thousand, five hundred sixty-one".