2259621 has 48 divisors (see below), whose sum is σ = 4193280. Its totient is φ = 1140480.

The previous prime is 2259601. The next prime is 2259629. The reversal of 2259621 is 1269522.

2259621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2259621 - 2⁶ = 2259557 is a prime.

2259621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2259629) 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 47 ways as a sum of consecutive naturals, for example, 25345 + ... + 25433.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2^2259621 is an apocalyptic number.

2259621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2259621 is a deficient number, since it is larger than the sum of its proper divisors (1933659).

2259621 is a wasteful number, since it uses less digits than its factorization.

2259621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 143 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2259621 is about 1503.2035790271. The cubic root of 2259621 is about 131.2235756328.

Subtracting from 2259621 its reverse (1269522), we obtain a palindrome (990099).

The spelling of 2259621 in words is "two million, two hundred fifty-nine thousand, six hundred twenty-one".