1145643845 has 6 divisors (see below), whose sum is σ = 1374863442. Its totient is φ = 916454528.

The previous prime is 1145643773. The next prime is 1145643857. The reversal of 1145643845 is 5483465411.

It can be written as a sum of positive squares in 3 ways, for example, as 197065444 + 948578401 = 14038^2 + 30799^2 .

It is not a de Polignac number, because 1145643845 - 2¹² = 1145639749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68117 + ... + 83253.

It is an arithmetic number, because the mean of its divisors is an integer number (229143907).

Almost surely, 2^1145643845 is an apocalyptic number.

It is an amenable number.

1145643845 is a deficient number, since it is larger than the sum of its proper divisors (229219597).

1145643845 is an frugal number, since it uses more digits than its factorization.

1145643845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30279 (or 15142 counting only the distinct ones).

The product of its digits is 230400, while the sum is 41.

The square root of 1145643845 is about 33847.3609754143. The cubic root of 1145643845 is about 1046.3650103120.

The spelling of 1145643845 in words is "one billion, one hundred forty-five million, six hundred forty-three thousand, eight hundred forty-five".