2021289 has 8 divisors (see below), whose sum is σ = 2709792. Its totient is φ = 1340160.

The previous prime is 2021251. The next prime is 2021291. The reversal of 2021289 is 9821202.

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

It is a de Polignac number, because none of the positive numbers 2^k-2021289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (338724).

2^2021289 is an apocalyptic number.

It is an amenable number.

2021289 is a deficient number, since it is larger than the sum of its proper divisors (688503).

2021289 is a wasteful number, since it uses less digits than its factorization.

2021289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2021289 is about 1421.7204366541. The cubic root of 2021289 is about 126.4375691147.

It can be divided in two parts, 20212 and 89, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 2021289 in words is "two million, twenty-one thousand, two hundred eighty-nine".