1143212578 has 4 divisors (see below), whose sum is σ = 1714818870. Its totient is φ = 571606288.

The previous prime is 1143212573. The next prime is 1143212621. The reversal of 1143212578 is 8752123411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8752123411 = 29 ⋅301797359.

It can be written as a sum of positive squares in only one way, i.e., 964909969 + 178302609 = 31063^2 + 13353^2 .

It is not an unprimeable number, because it can be changed into a prime (1143212573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 285803143 + ... + 285803146.

Almost surely, 2^1143212578 is an apocalyptic number.

1143212578 is a deficient number, since it is larger than the sum of its proper divisors (571606292).

1143212578 is an equidigital number, since it uses as much as digits as its factorization.

1143212578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571606291.

The product of its digits is 13440, while the sum is 34.

The square root of 1143212578 is about 33811.4267371254. The cubic root of 1143212578 is about 1045.6242930690.

Adding to 1143212578 its reverse (8752123411), we get a palindrome (9895335989).

The spelling of 1143212578 in words is "one billion, one hundred forty-three million, two hundred twelve thousand, five hundred seventy-eight".