1143204245 has 4 divisors (see below), whose sum is σ = 1371845100. Its totient is φ = 914563392.

The previous prime is 1143204221. The next prime is 1143204247. The reversal of 1143204245 is 5424023411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5424023411 = 2309 ⋅2349079.

It can be written as a sum of positive squares in 2 ways, for example, as 197149681 + 946054564 = 14041^2 + 30758^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143204245 - 2²² = 1139009941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143204247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114320420 + ... + 114320429.

It is an arithmetic number, because the mean of its divisors is an integer number (342961275).

Almost surely, 2^1143204245 is an apocalyptic number.

It is an amenable number.

1143204245 is a deficient number, since it is larger than the sum of its proper divisors (228640855).

1143204245 is an equidigital number, since it uses as much as digits as its factorization.

1143204245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228640854.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1143204245 is about 33811.3035093295. The cubic root of 1143204245 is about 1045.6217525067.

Adding to 1143204245 its reverse (5424023411), we get a palindrome (6567227656).

The spelling of 1143204245 in words is "one billion, one hundred forty-three million, two hundred four thousand, two hundred forty-five".