426005221 has 2 divisors, whose sum is σ = 426005222. Its totient is φ = 426005220.

The previous prime is 426005201. The next prime is 426005231. The reversal of 426005221 is 122500624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425596900 + 408321 = 20630^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 426005221 - 2⁷ = 426005093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 426005192 and 426005201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426005201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213002610 + 213002611.

It is an arithmetic number, because the mean of its divisors is an integer number (213002611).

Almost surely, 2^426005221 is an apocalyptic number.

It is an amenable number.

426005221 is a deficient number, since it is larger than the sum of its proper divisors (1).

426005221 is an equidigital number, since it uses as much as digits as its factorization.

426005221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 426005221 is about 20639.8939193010. The cubic root of 426005221 is about 752.4395942726.

Adding to 426005221 its reverse (122500624), we get a palindrome (548505845).

The spelling of 426005221 in words is "four hundred twenty-six million, five thousand, two hundred twenty-one".