426640001 has 2 divisors, whose sum is σ = 426640002. Its totient is φ = 426640000.

The previous prime is 426639991. The next prime is 426640013. The reversal of 426640001 is 100046624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321269776 + 105370225 = 17924^2 + 10265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426640001 is a prime.

It is not a weakly prime, because it can be changed into another prime (426640021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213320000 + 213320001.

It is an arithmetic number, because the mean of its divisors is an integer number (213320001).

Almost surely, 2^426640001 is an apocalyptic number.

It is an amenable number.

426640001 is a deficient number, since it is larger than the sum of its proper divisors (1).

426640001 is an equidigital number, since it uses as much as digits as its factorization.

426640001 is an odious number, because the sum of its binary digits is odd.

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

The square root of 426640001 is about 20655.2656966692. The cubic root of 426640001 is about 752.8131394324.

Adding to 426640001 its reverse (100046624), we get a palindrome (526686625).

The spelling of 426640001 in words is "four hundred twenty-six million, six hundred forty thousand, one".