426422021 has 2 divisors, whose sum is σ = 426422022. Its totient is φ = 426422020.

The previous prime is 426421973. The next prime is 426422027. The reversal of 426422021 is 120224624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411684100 + 14737921 = 20290^2 + 3839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426422021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426422027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213211010 + 213211011.

It is an arithmetic number, because the mean of its divisors is an integer number (213211011).

Almost surely, 2^426422021 is an apocalyptic number.

It is an amenable number.

426422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

426422021 is an equidigital number, since it uses as much as digits as its factorization.

426422021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 426422021 is about 20649.9884019338. The cubic root of 426422021 is about 752.6849078532.

Adding to 426422021 its reverse (120224624), we get a palindrome (546646645).

The spelling of 426422021 in words is "four hundred twenty-six million, four hundred twenty-two thousand, twenty-one".