1115556123 has 8 divisors (see below), whose sum is σ = 1622627136. Its totient is φ = 676094600.

The previous prime is 1115556109. The next prime is 1115556151. The reversal of 1115556123 is 3216555111.

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 1115556123 - 2⁴ = 1115556107 is a prime.

It is a super-2 number, since 2×1115556123² = 2488930927125582258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1115556193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16902333 + ... + 16902398.

It is an arithmetic number, because the mean of its divisors is an integer number (202828392).

Almost surely, 2^1115556123 is an apocalyptic number.

1115556123 is a deficient number, since it is larger than the sum of its proper divisors (507071013).

1115556123 is a wasteful number, since it uses less digits than its factorization.

1115556123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33804745.

The product of its digits is 4500, while the sum is 30.

The square root of 1115556123 is about 33399.9419610274. The cubic root of 1115556123 is about 1037.1234994837.

The spelling of 1115556123 in words is "one billion, one hundred fifteen million, five hundred fifty-six thousand, one hundred twenty-three".