1115120 has 40 divisors (see below), whose sum is σ = 2651616. Its totient is φ = 435968.

The previous prime is 1115117. The next prime is 1115131. The reversal of 1115120 is 215111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1115120² = 2486985228800, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

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, 4109 + ... + 4371.

2^1115120 is an apocalyptic number.

1115120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1325808).

1115120 is an abundant number, since it is smaller than the sum of its proper divisors (1536496).

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

1115120 is a wasteful number, since it uses less digits than its factorization.

1115120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1115120 is about 1055.9924242152. The cubic root of 1115120 is about 103.6988328526.

Subtracting from 1115120 its reverse (215111), we obtain a palindrome (900009).

The spelling of 1115120 in words is "one million, one hundred fifteen thousand, one hundred twenty".