2641621 has 4 divisors (see below), whose sum is σ = 2659500. Its totient is φ = 2623744.

The previous prime is 2641577. The next prime is 2641631. The reversal of 2641621 is 1261462.

2641621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 980100 + 1661521 = 990^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641621 - 2⁷ = 2641493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2641592 and 2641601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641631) 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 3 ways as a sum of consecutive naturals, for example, 8716 + ... + 9013.

It is an arithmetic number, because the mean of its divisors is an integer number (664875).

2^2641621 is an apocalyptic number.

It is an amenable number.

2641621 is a deficient number, since it is larger than the sum of its proper divisors (17879).

2641621 is a wasteful number, since it uses less digits than its factorization.

2641621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17878.

The product of its digits is 576, while the sum is 22.

The square root of 2641621 is about 1625.3064326459. The cubic root of 2641621 is about 138.2367461764.

The spelling of 2641621 in words is "two million, six hundred forty-one thousand, six hundred twenty-one".