2121896 has 24 divisors (see below), whose sum is σ = 4628970. Its totient is φ = 909216.

The previous prime is 2121893. The next prime is 2121907. The reversal of 2121896 is 6981212.

It can be written as a sum of positive squares in only one way, i.e., 1999396 + 122500 = 1414^2 + 350^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2121893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2315 + ... + 3098.

2^2121896 is an apocalyptic number.

It is an amenable number.

2121896 is an abundant number, since it is smaller than the sum of its proper divisors (2507074).

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

2121896 is a wasteful number, since it uses less digits than its factorization.

2121896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433 (or 5422 counting only the distinct ones).

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

The square root of 2121896 is about 1456.6729214206. The cubic root of 2121896 is about 128.5014509266.

The spelling of 2121896 in words is "two million, one hundred twenty-one thousand, eight hundred ninety-six".