2123712 has 56 divisors (see below), whose sum is σ = 6248400. Its totient is φ = 707328.

The previous prime is 2123707. The next prime is 2123731. The reversal of 2123712 is 2173212.

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

It is a nialpdrome in base 12.

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, 1114 + ... + 2342.

2^2123712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3124200).

2123712 is an abundant number, since it is smaller than the sum of its proper divisors (4124688).

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

2123712 is a wasteful number, since it uses less digits than its factorization.

2123712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1234 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 2123712 is about 1457.2961263930. The cubic root of 2123712 is about 128.5380992974.

Adding to 2123712 its reverse (2173212), we get a palindrome (4296924).

The spelling of 2123712 in words is "two million, one hundred twenty-three thousand, seven hundred twelve".