2021398 has 8 divisors (see below), whose sum is σ = 3040200. Its totient is φ = 1008000.

The previous prime is 2021381. The next prime is 2021431. The reversal of 2021398 is 8931202.

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

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, 228 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (380025).

2^2021398 is an apocalyptic number.

2021398 is a deficient number, since it is larger than the sum of its proper divisors (1018802).

2021398 is a wasteful number, since it uses less digits than its factorization.

2021398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2021398 is about 1421.7587699747. The cubic root of 2021398 is about 126.4398418307.

It can be divided in two parts, 202 and 1398, that added together give a square (1600 = 40²).

The spelling of 2021398 in words is "two million, twenty-one thousand, three hundred ninety-eight".