2112660 has 108 divisors (see below), whose sum is σ = 7116564. Its totient is φ = 506880.

The previous prime is 2112631. The next prime is 2112683. The reversal of 2112660 is 662112.

It is a happy number.

2112660 is a `hidden beast` number, since 2 + 1 + 1 + 2 + 660 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 853776 + 1258884 = 924^2 + 1122^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21732 + ... + 21828.

2^2112660 is an apocalyptic number.

2112660 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 2112660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3558282).

2112660 is an abundant number, since it is smaller than the sum of its proper divisors (5003904).

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

2112660 is a wasteful number, since it uses less digits than its factorization.

2112660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2112660 is about 1453.4992260060. The cubic root of 2112660 is about 128.3147365343.

2112660 divided by its sum of digits (18) gives a triangular number (117370 = T₄₈₄).

Adding to 2112660 its reverse (662112), we get a palindrome (2774772).

It can be divided in two parts, 2112 and 660, that added together give a palindrome (2772).

The spelling of 2112660 in words is "two million, one hundred twelve thousand, six hundred sixty".