2123700 has 36 divisors (see below), whose sum is σ = 6145440. Its totient is φ = 566240.

The previous prime is 2123683. The next prime is 2123701. The reversal of 2123700 is 73212.

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 2123700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3240 + ... + 3839.

2^2123700 is an apocalyptic number.

2123700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123700 is an abundant number, since it is smaller than the sum of its proper divisors (4021740).

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

2123700 is a wasteful number, since it uses less digits than its factorization.

2123700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096 (or 7089 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 2123700 is about 1457.2920091732. The cubic root of 2123700 is about 128.5378571961.

Adding to 2123700 its reverse (73212), we get a palindrome (2196912).

The spelling of 2123700 in words is "two million, one hundred twenty-three thousand, seven hundred".