1149128755 has 8 divisors (see below), whose sum is σ = 1386100512. Its totient is φ = 914539008.

The previous prime is 1149128749. The next prime is 1149128767. The reversal of 1149128755 is 5578219411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1149128755 - 2⁵ = 1149128723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594439 + ... + 596368.

It is an arithmetic number, because the mean of its divisors is an integer number (173262564).

Almost surely, 2^1149128755 is an apocalyptic number.

1149128755 is a deficient number, since it is larger than the sum of its proper divisors (236971757).

1149128755 is a wasteful number, since it uses less digits than its factorization.

1149128755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191005.

The product of its digits is 100800, while the sum is 43.

The square root of 1149128755 is about 33898.8016749855. The cubic root of 1149128755 is about 1047.4249082748.

The spelling of 1149128755 in words is "one billion, one hundred forty-nine million, one hundred twenty-eight thousand, seven hundred fifty-five".