426006221 has 4 divisors (see below), whose sum is σ = 426075744. Its totient is φ = 425936700.

The previous prime is 426006211. The next prime is 426006223. The reversal of 426006221 is 122600624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 426006221 - 2¹⁰ = 426005197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426006223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24575 + ... + 38156.

It is an arithmetic number, because the mean of its divisors is an integer number (106518936).

Almost surely, 2^426006221 is an apocalyptic number.

It is an amenable number.

426006221 is a deficient number, since it is larger than the sum of its proper divisors (69523).

426006221 is an equidigital number, since it uses as much as digits as its factorization.

426006221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69522.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 426006221 is about 20639.9181442175. The cubic root of 426006221 is about 752.4401830283.

Adding to 426006221 its reverse (122600624), we get a palindrome (548606845).

The spelling of 426006221 in words is "four hundred twenty-six million, six thousand, two hundred twenty-one".