2860221 has 16 divisors (see below), whose sum is σ = 4694144. Its totient is φ = 1508544.

The previous prime is 2860181. The next prime is 2860223. The reversal of 2860221 is 1220682.

2860221 = T₄₅₆ + T₄₅₇ + ... + T₄₈₁.

It is not a de Polignac number, because 2860221 - 2⁶ = 2860157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2860223) 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, 4966 + ... + 5511.

It is an arithmetic number, because the mean of its divisors is an integer number (293384).

2^2860221 is an apocalyptic number.

2860221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2860221 is a deficient number, since it is larger than the sum of its proper divisors (1833923).

2860221 is a wasteful number, since it uses less digits than its factorization.

2860221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500.

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

The square root of 2860221 is about 1691.2187912863. The cubic root of 2860221 is about 141.9492809674.

It can be divided in two parts, 2860 and 221, that added together give a triangular number (3081 = T₇₈).

The spelling of 2860221 in words is "two million, eight hundred sixty thousand, two hundred twenty-one".