2620221 has 4 divisors (see below), whose sum is σ = 3493632. Its totient is φ = 1746812.

The previous prime is 2620207. The next prime is 2620223. The reversal of 2620221 is 1220262.

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 2620221 - 2¹¹ = 2618173 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2620221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620223) 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, 436701 + ... + 436706.

It is an arithmetic number, because the mean of its divisors is an integer number (873408).

2^2620221 is an apocalyptic number.

It is an amenable number.

2620221 is a deficient number, since it is larger than the sum of its proper divisors (873411).

2620221 is an equidigital number, since it uses as much as digits as its factorization.

2620221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873410.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2620221 is about 1618.7096713123. The cubic root of 2620221 is about 137.8624443232.

Adding to 2620221 its reverse (1220262), we get a palindrome (3840483).

The spelling of 2620221 in words is "two million, six hundred twenty thousand, two hundred twenty-one".