1065572609 has 4 divisors (see below), whose sum is σ = 1070146116. Its totient is φ = 1060999104.

The previous prime is 1065572591. The next prime is 1065572617. The reversal of 1065572609 is 9062755601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 462379009 + 603193600 = 21503^2 + 24560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065572609 - 2⁸ = 1065572353 is a prime.

It is a super-2 number, since 2×1065572609² = 2270889970102133762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065572689) 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, 2286404 + ... + 2286869.

It is an arithmetic number, because the mean of its divisors is an integer number (267536529).

Almost surely, 2^1065572609 is an apocalyptic number.

It is an amenable number.

1065572609 is a deficient number, since it is larger than the sum of its proper divisors (4573507).

1065572609 is an equidigital number, since it uses as much as digits as its factorization.

1065572609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573506.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 1065572609 is about 32643.1096711082. The cubic root of 1065572609 is about 1021.3964625616.

The spelling of 1065572609 in words is "one billion, sixty-five million, five hundred seventy-two thousand, six hundred nine".