426603521 has 2 divisors, whose sum is σ = 426603522. Its totient is φ = 426603520.

The previous prime is 426603511. The next prime is 426603547. The reversal of 426603521 is 125306624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269452225 + 157151296 = 16415^2 + 12536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426603521 is a prime.

It is not a weakly prime, because it can be changed into another prime (426603511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213301760 + 213301761.

It is an arithmetic number, because the mean of its divisors is an integer number (213301761).

Almost surely, 2^426603521 is an apocalyptic number.

It is an amenable number.

426603521 is a deficient number, since it is larger than the sum of its proper divisors (1).

426603521 is an equidigital number, since it uses as much as digits as its factorization.

426603521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 426603521 is about 20654.3826099935. The cubic root of 426603521 is about 752.7916823054.

The spelling of 426603521 in words is "four hundred twenty-six million, six hundred three thousand, five hundred twenty-one".