1187120 has 80 divisors (see below), whose sum is σ = 3214080. Its totient is φ = 403200.

The previous prime is 1187117. The next prime is 1187141. The reversal of 1187120 is 217811.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1187092 and 1187101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16685 + ... + 16755.

It is an arithmetic number, because the mean of its divisors is an integer number (40176).

2^1187120 is an apocalyptic number.

1187120 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 1187120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607040).

1187120 is an abundant number, since it is smaller than the sum of its proper divisors (2026960).

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

1187120 is a wasteful number, since it uses less digits than its factorization.

1187120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1187120 is about 1089.5503659767. The cubic root of 1187120 is about 105.8842928717.

The spelling of 1187120 in words is "one million, one hundred eighty-seven thousand, one hundred twenty".