1184606561 has 4 divisors (see below), whose sum is σ = 1188122052. Its totient is φ = 1181091072.

The previous prime is 1184606497. The next prime is 1184606573. The reversal of 1184606561 is 1656064811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1656064811 = 653 ⋅2536087.

It can be written as a sum of positive squares in 2 ways, for example, as 564347536 + 620259025 = 23756^2 + 24905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1184606561 - 2⁶ = 1184606497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1184606161) 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, 1757240 + ... + 1757913.

It is an arithmetic number, because the mean of its divisors is an integer number (297030513).

Almost surely, 2^1184606561 is an apocalyptic number.

It is an amenable number.

1184606561 is a deficient number, since it is larger than the sum of its proper divisors (3515491).

1184606561 is an equidigital number, since it uses as much as digits as its factorization.

1184606561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3515490.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 1184606561 is about 34418.1138501226. The cubic root of 1184606561 is about 1058.0951195743.

The spelling of 1184606561 in words is "one billion, one hundred eighty-four million, six hundred six thousand, five hundred sixty-one".