2647221 has 8 divisors (see below), whose sum is σ = 3537504. Its totient is φ = 1760880.

The previous prime is 2647193. The next prime is 2647243. The reversal of 2647221 is 1227462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2647221 - 2⁶ = 2647157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2647191 and 2647200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2647321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435 + ... + 2711.

It is an arithmetic number, because the mean of its divisors is an integer number (442188).

2^2647221 is an apocalyptic number.

It is an amenable number.

2647221 is a deficient number, since it is larger than the sum of its proper divisors (890283).

2647221 is a wasteful number, since it uses less digits than its factorization.

2647221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971.

The product of its digits is 1344, while the sum is 24.

The square root of 2647221 is about 1627.0282726492. The cubic root of 2647221 is about 138.3343604059.

The spelling of 2647221 in words is "two million, six hundred forty-seven thousand, two hundred twenty-one".