2260821 has 16 divisors (see below), whose sum is σ = 3136320. Its totient is φ = 1447680.

The previous prime is 2260801. The next prime is 2260823. The reversal of 2260821 is 1280622.

It is not a de Polignac number, because 2260821 - 2⁵ = 2260789 is a prime.

It is a super-2 number, since 2×2260821² = 10222623188082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2260823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9261 + ... + 9501.

It is an arithmetic number, because the mean of its divisors is an integer number (196020).

2^2260821 is an apocalyptic number.

It is an amenable number.

2260821 is a deficient number, since it is larger than the sum of its proper divisors (875499).

2260821 is a wasteful number, since it uses less digits than its factorization.

2260821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2260821 is about 1503.6026735810. The cubic root of 2260821 is about 131.2468008291.

It can be divided in two parts, 2260 and 821, that added together give a triangular number (3081 = T₇₈).

The spelling of 2260821 in words is "two million, two hundred sixty thousand, eight hundred twenty-one".