426242521 has 2 divisors, whose sum is σ = 426242522. Its totient is φ = 426242520.

The previous prime is 426242507. The next prime is 426242533. The reversal of 426242521 is 125242624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393466896 + 32775625 = 19836^2 + 5725^2 .

It is a cyclic number.

It is not a de Polignac number, because 426242521 - 2⁵ = 426242489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 426242521.

It is not a weakly prime, because it can be changed into another prime (426242021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213121260 + 213121261.

It is an arithmetic number, because the mean of its divisors is an integer number (213121261).

Almost surely, 2^426242521 is an apocalyptic number.

It is an amenable number.

426242521 is a deficient number, since it is larger than the sum of its proper divisors (1).

426242521 is an equidigital number, since it uses as much as digits as its factorization.

426242521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 28.

The square root of 426242521 is about 20645.6416950406. The cubic root of 426242521 is about 752.5792801759.

The spelling of 426242521 in words is "four hundred twenty-six million, two hundred forty-two thousand, five hundred twenty-one".