2028561 has 8 divisors (see below), whose sum is σ = 2733024. Its totient is φ = 1338240.

The previous prime is 2028527. The next prime is 2028581. The reversal of 2028561 is 1658202.

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

It is not a de Polignac number, because 2028561 - 2¹⁰ = 2027537 is a prime.

It is a super-3 number, since 3×2028561³ = 25042949047233367443, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2028511) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3195 + ... + 3776.

It is an arithmetic number, because the mean of its divisors is an integer number (341628).

2^2028561 is an apocalyptic number.

It is an amenable number.

2028561 is a deficient number, since it is larger than the sum of its proper divisors (704463).

2028561 is an equidigital number, since it uses as much as digits as its factorization.

2028561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7071.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 2028561 is about 1424.2756053517. The cubic root of 2028561 is about 126.5890159654.

The spelling of 2028561 in words is "two million, twenty-eight thousand, five hundred sixty-one".