2123930 has 16 divisors (see below), whose sum is σ = 3905280. Its totient is φ = 831312.

The previous prime is 2123917. The next prime is 2123939. The reversal of 2123930 is 393212.

It is a super-2 number, since 2×2123930² = 9022157289800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2123939) 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, 1790 + ... + 2729.

It is an arithmetic number, because the mean of its divisors is an integer number (244080).

2^2123930 is an apocalyptic number.

2123930 is a deficient number, since it is larger than the sum of its proper divisors (1781350).

2123930 is a wasteful number, since it uses less digits than its factorization.

2123930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 2123930 is about 1457.3709205278. The cubic root of 2123930 is about 128.5424973116.

The spelling of 2123930 in words is "two million, one hundred twenty-three thousand, nine hundred thirty".