2121198 has 32 divisors (see below), whose sum is σ = 4665600. Its totient is φ = 639936.

The previous prime is 2121193. The next prime is 2121199. The reversal of 2121198 is 8911212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121191) 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, 2218 + ... + 3026.

It is an arithmetic number, because the mean of its divisors is an integer number (145800).

2^2121198 is an apocalyptic number.

2121198 is an abundant number, since it is smaller than the sum of its proper divisors (2544402).

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

2121198 is a wasteful number, since it uses less digits than its factorization.

2121198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856.

The product of its digits is 288, while the sum is 24.

The square root of 2121198 is about 1456.4333146423. The cubic root of 2121198 is about 128.4873591506.

The spelling of 2121198 in words is "two million, one hundred twenty-one thousand, one hundred ninety-eight".