1115121375 has 96 divisors (see below), whose sum is σ = 2146435200. Its totient is φ = 555033600.

The previous prime is 1115121373. The next prime is 1115121377. The reversal of 1115121375 is 5731215111.

1115121375 is a `hidden beast` number, since 1 + 11 + 512 + 137 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1115121373) and next prime (1115121377).

It is not a de Polignac number, because 1115121375 - 2¹ = 1115121373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115121373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3805729 + ... + 3806021.

It is an arithmetic number, because the mean of its divisors is an integer number (22358700).

Almost surely, 2^1115121375 is an apocalyptic number.

1115121375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1115121375 is a deficient number, since it is larger than the sum of its proper divisors (1031313825).

1115121375 is a wasteful number, since it uses less digits than its factorization.

1115121375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 517 counting only the distinct ones).

The product of its digits is 1050, while the sum is 27.

The square root of 1115121375 is about 33393.4331119159. The cubic root of 1115121375 is about 1036.9887547458.

Adding to 1115121375 its reverse (5731215111), we get a palindrome (6846336486).

The spelling of 1115121375 in words is "one billion, one hundred fifteen million, one hundred twenty-one thousand, three hundred seventy-five".