2121992 has 8 divisors (see below), whose sum is σ = 3978750. Its totient is φ = 1060992.

The previous prime is 2121989. The next prime is 2122009. The reversal of 2121992 is 2991212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1865956 + 256036 = 1366^2 + 506^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132617 + ... + 132632.

2^2121992 is an apocalyptic number.

It is an amenable number.

2121992 is a deficient number, since it is larger than the sum of its proper divisors (1856758).

2121992 is a wasteful number, since it uses less digits than its factorization.

2121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265255 (or 265251 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

The square root of 2121992 is about 1456.7058728515. The cubic root of 2121992 is about 128.5033888088.

It can be divided in two parts, 2121 and 992, that added together give a palindrome (3113).

The spelling of 2121992 in words is "two million, one hundred twenty-one thousand, nine hundred ninety-two".