2641221 has 16 divisors (see below), whose sum is σ = 4269120. Its totient is φ = 1600560.

The previous prime is 2641217. The next prime is 2641237. The reversal of 2641221 is 1221462.

2641221 is a `hidden beast` number, since 2 + 641 + 2 + 21 = 666.

It is not a de Polignac number, because 2641221 - 2² = 2641217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2641194 and 2641203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4150 + ... + 4743.

It is an arithmetic number, because the mean of its divisors is an integer number (266820).

2^2641221 is an apocalyptic number.

It is an amenable number.

2641221 is a deficient number, since it is larger than the sum of its proper divisors (1627899).

2641221 is a wasteful number, since it uses less digits than its factorization.

2641221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8913 (or 8907 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2641221 is about 1625.1833742689. The cubic root of 2641221 is about 138.2297684545.

Adding to 2641221 its reverse (1221462), we get a palindrome (3862683).

It can be divided in two parts, 264 and 1221, that added together give a triangular number (1485 = T₅₄).

The spelling of 2641221 in words is "two million, six hundred forty-one thousand, two hundred twenty-one".