420415529 has 2 divisors, whose sum is σ = 420415530. Its totient is φ = 420415528.

The previous prime is 420415511. The next prime is 420415531. The reversal of 420415529 is 925514024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 410143504 + 10272025 = 20252^2 + 3205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420415529 is a prime.

Together with 420415531, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420415495 and 420415504.

It is not a weakly prime, because it can be changed into another prime (420415829) 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, 210207764 + 210207765.

It is an arithmetic number, because the mean of its divisors is an integer number (210207765).

Almost surely, 2^420415529 is an apocalyptic number.

It is an amenable number.

420415529 is a deficient number, since it is larger than the sum of its proper divisors (1).

420415529 is an equidigital number, since it uses as much as digits as its factorization.

420415529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 420415529 is about 20504.0368952068. The cubic root of 420415529 is about 749.1341290376.

The spelling of 420415529 in words is "four hundred twenty million, four hundred fifteen thousand, five hundred twenty-nine".