1143494578 has 4 divisors (see below), whose sum is σ = 1715241870. Its totient is φ = 571747288.

The previous prime is 1143494549. The next prime is 1143494587. The reversal of 1143494578 is 8754943411.

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

It can be written as a sum of positive squares in only one way, i.e., 606784689 + 536709889 = 24633^2 + 23167^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285873643 + ... + 285873646.

Almost surely, 2^1143494578 is an apocalyptic number.

1143494578 is a deficient number, since it is larger than the sum of its proper divisors (571747292).

1143494578 is an equidigital number, since it uses as much as digits as its factorization.

1143494578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571747291.

The product of its digits is 483840, while the sum is 46.

The square root of 1143494578 is about 33815.5966678100. The cubic root of 1143494578 is about 1045.7102618598.

The spelling of 1143494578 in words is "one billion, one hundred forty-three million, four hundred ninety-four thousand, five hundred seventy-eight".