1143549445 has 4 divisors (see below), whose sum is σ = 1372259340. Its totient is φ = 914839552.

The previous prime is 1143549427. The next prime is 1143549461. The reversal of 1143549445 is 5449453411.

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 162231169 + 981318276 = 12737^2 + 31326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143549445 - 2⁵ = 1143549413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1143549398 and 1143549407.

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 3 ways as a sum of consecutive naturals, for example, 114354940 + ... + 114354949.

It is an arithmetic number, because the mean of its divisors is an integer number (343064835).

Almost surely, 2^1143549445 is an apocalyptic number.

It is an amenable number.

1143549445 is a deficient number, since it is larger than the sum of its proper divisors (228709895).

1143549445 is an equidigital number, since it uses as much as digits as its factorization.

1143549445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228709894.

The product of its digits is 172800, while the sum is 40.

The square root of 1143549445 is about 33816.4079257392. The cubic root of 1143549445 is about 1045.7269866344.

The spelling of 1143549445 in words is "one billion, one hundred forty-three million, five hundred forty-nine thousand, four hundred forty-five".