2155120 has 80 divisors (see below), whose sum is σ = 5713920. Its totient is φ = 748800.

The previous prime is 2155103. The next prime is 2155121. The reversal of 2155120 is 215512.

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 (16).

It is a junction number, because it is equal to n+sod(n) for n = 2155094 and 2155103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27241 + ... + 27319.

It is an arithmetic number, because the mean of its divisors is an integer number (71424).

2^2155120 is an apocalyptic number.

2155120 is a gapful number since it is divisible by the number (20) 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 2155120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2856960).

2155120 is an abundant number, since it is smaller than the sum of its proper divisors (3558800).

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

2155120 is a wasteful number, since it uses less digits than its factorization.

2155120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2155120 is about 1468.0326971835. The cubic root of 2155120 is about 129.1686594675.

It can be divided in two parts, 215 and 5120, that added together give a palindrome (5335).

The spelling of 2155120 in words is "two million, one hundred fifty-five thousand, one hundred twenty".