2123912 has 64 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 811008.

The previous prime is 2123909. The next prime is 2123917. The reversal of 2123912 is 2193212.

It is a super-2 number, since 2×2123912² = 9022004367488, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2 + 1 + 2⁹ + 3⁹ + 9⁴ + 1 + 2²¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21848 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^2123912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

2123912 is an abundant number, since it is smaller than the sum of its proper divisors (2956408).

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

2123912 is a wasteful number, since it uses less digits than its factorization.

2123912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 146 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 2123912 is about 1457.3647450107. The cubic root of 2123912 is about 128.5421341842.

The spelling of 2123912 in words is "two million, one hundred twenty-three thousand, nine hundred twelve".