1154991127 has 4 divisors (see below), whose sum is σ = 1155063456. Its totient is φ = 1154918800.

The previous prime is 1154991121. The next prime is 1154991191. The reversal of 1154991127 is 7211994511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7211994511 = 1753 ⋅4114087.

It is a cyclic number.

It is not a de Polignac number, because 1154991127 - 2³ = 1154991119 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1154991127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154991121) 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, 463 + ... + 48064.

It is an arithmetic number, because the mean of its divisors is an integer number (288765864).

Almost surely, 2^1154991127 is an apocalyptic number.

1154991127 is a deficient number, since it is larger than the sum of its proper divisors (72329).

1154991127 is an equidigital number, since it uses as much as digits as its factorization.

1154991127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72328.

The product of its digits is 22680, while the sum is 40.

The square root of 1154991127 is about 33985.1603939131. The cubic root of 1154991127 is about 1049.2030618014.

The spelling of 1154991127 in words is "one billion, one hundred fifty-four million, nine hundred ninety-one thousand, one hundred twenty-seven".