1154128013 has 4 divisors (see below), whose sum is σ = 1185320700. Its totient is φ = 1122935328.

The previous prime is 1154128007. The next prime is 1154128037. The reversal of 1154128013 is 3108214511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3108214511 = 2741 ⋅1133971.

It can be written as a sum of positive squares in 2 ways, for example, as 430894564 + 723233449 = 20758^2 + 26893^2 .

It is a cyclic number.

It is not a de Polignac number, because 1154128013 - 2²⁸ = 885692557 is a prime.

It is a super-2 number, since 2×1154128013² = 2664022940782656338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1154128093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15596288 + ... + 15596361.

It is an arithmetic number, because the mean of its divisors is an integer number (296330175).

Almost surely, 2^1154128013 is an apocalyptic number.

It is an amenable number.

1154128013 is a deficient number, since it is larger than the sum of its proper divisors (31192687).

1154128013 is an equidigital number, since it uses as much as digits as its factorization.

1154128013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31192686.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1154128013 is about 33972.4596254083. The cubic root of 1154128013 is about 1048.9416434806.

The spelling of 1154128013 in words is "one billion, one hundred fifty-four million, one hundred twenty-eight thousand, thirteen".