2224721 has 8 divisors (see below), whose sum is σ = 2337984. Its totient is φ = 2112880.

The previous prime is 2224709. The next prime is 2224741. The reversal of 2224721 is 1274222.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2224721 - 2⁶ = 2224657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2224693 and 2224702.

It is not an unprimeable number, because it can be changed into a prime (2224741) 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, 4286 + ... + 4776.

It is an arithmetic number, because the mean of its divisors is an integer number (292248).

2^2224721 is an apocalyptic number.

It is an amenable number.

2224721 is a deficient number, since it is larger than the sum of its proper divisors (113263).

2224721 is a wasteful number, since it uses less digits than its factorization.

2224721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

The product of its digits is 448, while the sum is 20.

The square root of 2224721 is about 1491.5498650732. The cubic root of 2224721 is about 130.5444816387.

Adding to 2224721 its reverse (1274222), we get a palindrome (3498943).

The spelling of 2224721 in words is "two million, two hundred twenty-four thousand, seven hundred twenty-one".