1143260551 has 4 divisors (see below), whose sum is σ = 1154360272. Its totient is φ = 1132160832.

The previous prime is 1143260539. The next prime is 1143260581. The reversal of 1143260551 is 1550623411.

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

It is a cyclic number.

It is not a de Polignac number, because 1143260551 - 2¹³ = 1143252359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143260581) 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, 5549706 + ... + 5549911.

It is an arithmetic number, because the mean of its divisors is an integer number (288590068).

Almost surely, 2^1143260551 is an apocalyptic number.

1143260551 is a deficient number, since it is larger than the sum of its proper divisors (11099721).

1143260551 is a wasteful number, since it uses less digits than its factorization.

1143260551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11099720.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1143260551 is about 33812.1361496135. The cubic root of 1143260551 is about 1045.6389188215.

Adding to 1143260551 its reverse (1550623411), we get a palindrome (2693883962).

The spelling of 1143260551 in words is "one billion, one hundred forty-three million, two hundred sixty thousand, five hundred fifty-one".