4226721 has 16 divisors (see below), whose sum is σ = 6139200. Its totient is φ = 2576448.

The previous prime is 4226713. The next prime is 4226767. The reversal of 4226721 is 1276224.

It is not a de Polignac number, because 4226721 - 2³ = 4226713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4226691 and 4226700.

It is not an unprimeable number, because it can be changed into a prime (4226711) 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, 375 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (383700).

Almost surely, 2^4226721 is an apocalyptic number.

It is an amenable number.

4226721 is a deficient number, since it is larger than the sum of its proper divisors (1912479).

4226721 is a wasteful number, since it uses less digits than its factorization.

4226721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608.

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

The square root of 4226721 is about 2055.8990733983. The cubic root of 4226721 is about 161.6843036461.

The spelling of 4226721 in words is "four million, two hundred twenty-six thousand, seven hundred twenty-one".