1115655121 has 8 divisors (see below), whose sum is σ = 1302163200. Its totient is φ = 935929248.

The previous prime is 1115655113. The next prime is 1115655127. The reversal of 1115655121 is 1215565111.

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 1115655121 - 2³ = 1115655113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115655121.

It is not an unprimeable number, because it can be changed into a prime (1115655127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695196 + ... + 1695853.

It is an arithmetic number, because the mean of its divisors is an integer number (162770400).

Almost surely, 2^1115655121 is an apocalyptic number.

It is an amenable number.

1115655121 is a deficient number, since it is larger than the sum of its proper divisors (186508079).

1115655121 is an equidigital number, since it uses as much as digits as its factorization.

1115655121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3391103.

The product of its digits is 1500, while the sum is 28.

The square root of 1115655121 is about 33401.4239367126. The cubic root of 1115655121 is about 1037.1541777893.

The spelling of 1115655121 in words is "one billion, one hundred fifteen million, six hundred fifty-five thousand, one hundred twenty-one".