1143241557 has 4 divisors (see below), whose sum is σ = 1524322080. Its totient is φ = 762161036.

The previous prime is 1143241553. The next prime is 1143241601. The reversal of 1143241557 is 7551423411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1143241557 - 2² = 1143241553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143241553) 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, 190540257 + ... + 190540262.

It is an arithmetic number, because the mean of its divisors is an integer number (381080520).

Almost surely, 2^1143241557 is an apocalyptic number.

It is an amenable number.

1143241557 is a deficient number, since it is larger than the sum of its proper divisors (381080523).

1143241557 is an equidigital number, since it uses as much as digits as its factorization.

1143241557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381080522.

The product of its digits is 16800, while the sum is 33.

The square root of 1143241557 is about 33811.8552729660. The cubic root of 1143241557 is about 1045.6331280810.

Adding to 1143241557 its reverse (7551423411), we get a palindrome (8694664968).

The spelling of 1143241557 in words is "one billion, one hundred forty-three million, two hundred forty-one thousand, five hundred fifty-seven".