1115123140 has 24 divisors (see below), whose sum is σ = 2343521880. Its totient is φ = 445713408.

The previous prime is 1115123137. The next prime is 1115123153. The reversal of 1115123140 is 413215111.

It can be written as a sum of positive squares in 4 ways, for example, as 261080964 + 854042176 = 16158^2 + 29224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7156 + ... + 47764.

It is an arithmetic number, because the mean of its divisors is an integer number (97646745).

Almost surely, 2^1115123140 is an apocalyptic number.

1115123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115123140 is an abundant number, since it is smaller than the sum of its proper divisors (1228398740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1115123140 is a wasteful number, since it uses less digits than its factorization.

1115123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41991 (or 41989 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1115123140 is about 33393.4595392571. The cubic root of 1115123140 is about 1036.9893018564.

Adding to 1115123140 its reverse (413215111), we get a palindrome (1528338251).

The spelling of 1115123140 in words is "one billion, one hundred fifteen million, one hundred twenty-three thousand, one hundred forty".