4221726 has 16 divisors (see below), whose sum is σ = 8463744. Its totient is φ = 1403864.

The previous prime is 4221713. The next prime is 4221751. The reversal of 4221726 is 6271224.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4221696 and 4221705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3985 + ... + 4931.

It is an arithmetic number, because the mean of its divisors is an integer number (528984).

Almost surely, 2^4221726 is an apocalyptic number.

4221726 is an abundant number, since it is smaller than the sum of its proper divisors (4242018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221726 is a wasteful number, since it uses less digits than its factorization.

4221726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695.

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

The square root of 4221726 is about 2054.6839172973. The cubic root of 4221726 is about 161.6205874745.

The spelling of 4221726 in words is "four million, two hundred twenty-one thousand, seven hundred twenty-six".