420246523 has 2 divisors, whose sum is σ = 420246524. Its totient is φ = 420246522.

The previous prime is 420246479. The next prime is 420246527. The reversal of 420246523 is 325642024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420246523 - 2²¹ = 418149371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420246491 and 420246500.

It is not a weakly prime, because it can be changed into another prime (420246527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210123261 + 210123262.

It is an arithmetic number, because the mean of its divisors is an integer number (210123262).

Almost surely, 2^420246523 is an apocalyptic number.

420246523 is a deficient number, since it is larger than the sum of its proper divisors (1).

420246523 is an equidigital number, since it uses as much as digits as its factorization.

420246523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 420246523 is about 20499.9151949465. The cubic root of 420246523 is about 749.0337322293.

Adding to 420246523 its reverse (325642024), we get a palindrome (745888547).

The spelling of 420246523 in words is "four hundred twenty million, two hundred forty-six thousand, five hundred twenty-three".