2123684 has 12 divisors (see below), whose sum is σ = 3803184. Its totient is φ = 1037064.

The previous prime is 2123683. The next prime is 2123701. The reversal of 2123684 is 4863212.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2123683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6002 + ... + 6345.

It is an arithmetic number, because the mean of its divisors is an integer number (316932).

2^2123684 is an apocalyptic number.

It is an amenable number.

2123684 is a deficient number, since it is larger than the sum of its proper divisors (1679500).

2123684 is a wasteful number, since it uses less digits than its factorization.

2123684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12394 (or 12392 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 2123684 is about 1457.2865195287. The cubic root of 2123684 is about 128.5375343930.

Adding to 2123684 its reverse (4863212), we get a palindrome (6986896).

The spelling of 2123684 in words is "two million, one hundred twenty-three thousand, six hundred eighty-four".