1185245563 has 4 divisors (see below), whose sum is σ = 1188373240. Its totient is φ = 1182117888.

The previous prime is 1185245557. The next prime is 1185245609. The reversal of 1185245563 is 3655425811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1185245563 is a prime.

It is a super-2 number, since 2×1185245563² = 2809614089222373938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1185245543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563270 + ... + 1564027.

It is an arithmetic number, because the mean of its divisors is an integer number (297093310).

Almost surely, 2^1185245563 is an apocalyptic number.

1185245563 is a deficient number, since it is larger than the sum of its proper divisors (3127677).

1185245563 is an equidigital number, since it uses as much as digits as its factorization.

1185245563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127676.

The product of its digits is 144000, while the sum is 40.

The square root of 1185245563 is about 34427.3955303041. The cubic root of 1185245563 is about 1058.2853383874.

The spelling of 1185245563 in words is "one billion, one hundred eighty-five million, two hundred forty-five thousand, five hundred sixty-three".