2121398 has 8 divisors (see below), whose sum is σ = 3188808. Its totient is φ = 1058464.

The previous prime is 2121389. The next prime is 2121403. The reversal of 2121398 is 8931212.

2121398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 2¹⁹ + 1 + 3¹³ + 9³ + 8 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590 + ... + 2142.

It is an arithmetic number, because the mean of its divisors is an integer number (398601).

2^2121398 is an apocalyptic number.

2121398 is a deficient number, since it is larger than the sum of its proper divisors (1067410).

2121398 is a wasteful number, since it uses less digits than its factorization.

2121398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238.

The product of its digits is 864, while the sum is 26.

The square root of 2121398 is about 1456.5019739087. The cubic root of 2121398 is about 128.4913972247.

The spelling of 2121398 in words is "two million, one hundred twenty-one thousand, three hundred ninety-eight".