2121968 has 10 divisors (see below), whose sum is σ = 4111344. Its totient is φ = 1060976.

The previous prime is 2121967. The next prime is 2121979. The reversal of 2121968 is 8691212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66296 + ... + 66327.

2^2121968 is an apocalyptic number.

It is an amenable number.

2121968 is a deficient number, since it is larger than the sum of its proper divisors (1989376).

2121968 is a wasteful number, since it uses less digits than its factorization.

2121968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132631 (or 132625 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 2121968 is about 1456.6976350636. The cubic root of 2121968 is about 128.5029043437.

The spelling of 2121968 in words is "two million, one hundred twenty-one thousand, nine hundred sixty-eight".