2559021 has 4 divisors (see below), whose sum is σ = 3412032. Its totient is φ = 1706012.

The previous prime is 2559013. The next prime is 2559041. The reversal of 2559021 is 1209552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2559021 - 2³ = 2559013 is a prime.

It is a D-number.

2559021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2558982 and 2559000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2559041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426501 + ... + 426506.

It is an arithmetic number, because the mean of its divisors is an integer number (853008).

2^2559021 is an apocalyptic number.

It is an amenable number.

2559021 is a deficient number, since it is larger than the sum of its proper divisors (853011).

2559021 is an equidigital number, since it uses as much as digits as its factorization.

2559021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853010.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 2559021 is about 1599.6940332451. The cubic root of 2559021 is about 136.7806353185.

The spelling of 2559021 in words is "two million, five hundred fifty-nine thousand, twenty-one".