2123520 has 144 divisors (see below), whose sum is σ = 7848960. Its totient is φ = 479232.

The previous prime is 2123491. The next prime is 2123557. The reversal of 2123520 is 253212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2123520.

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, 26841 + ... + 26919.

2^2123520 is an apocalyptic number.

2123520 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 2123520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3924480).

2123520 is an abundant number, since it is smaller than the sum of its proper divisors (5725440).

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

2123520 is an equidigital number, since it uses as much as digits as its factorization.

2123520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2123520 is about 1457.2302494802. The cubic root of 2123520 is about 128.5342255677.

Adding to 2123520 its reverse (253212), we get a palindrome (2376732).

The spelling of 2123520 in words is "two million, one hundred twenty-three thousand, five hundred twenty".