426420517 has 2 divisors, whose sum is σ = 426420518. Its totient is φ = 426420516.

The previous prime is 426420509. The next prime is 426420539. The reversal of 426420517 is 715024624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337420161 + 89000356 = 18369^2 + 9434^2 .

It is a cyclic number.

It is not a de Polignac number, because 426420517 - 2³ = 426420509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426420587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213210258 + 213210259.

It is an arithmetic number, because the mean of its divisors is an integer number (213210259).

Almost surely, 2^426420517 is an apocalyptic number.

It is an amenable number.

426420517 is a deficient number, since it is larger than the sum of its proper divisors (1).

426420517 is an equidigital number, since it uses as much as digits as its factorization.

426420517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 426420517 is about 20649.9519854163. The cubic root of 426420517 is about 752.6840229400.

The spelling of 426420517 in words is "four hundred twenty-six million, four hundred twenty thousand, five hundred seventeen".