2123556 has 24 divisors (see below), whose sum is σ = 4980864. Its totient is φ = 704160.

The previous prime is 2123491. The next prime is 2123557. The reversal of 2123556 is 6553212.

It is not an unprimeable number, because it can be changed into a prime (2123557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2926 + ... + 3578.

It is an arithmetic number, because the mean of its divisors is an integer number (207536).

2^2123556 is an apocalyptic number.

It is an amenable number.

2123556 is an abundant number, since it is smaller than the sum of its proper divisors (2857308).

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

2123556 is a wasteful number, since it uses less digits than its factorization.

2123556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 929 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 2123556 is about 1457.2426016282. The cubic root of 2123556 is about 128.5349519098.

Adding to 2123556 its reverse (6553212), we get a palindrome (8676768).

The spelling of 2123556 in words is "two million, one hundred twenty-three thousand, five hundred fifty-six".