420532523 has 2 divisors, whose sum is σ = 420532524. Its totient is φ = 420532522.

The previous prime is 420532513. The next prime is 420532549. The reversal of 420532523 is 325235024.

It is an a-pointer prime, because the next prime (420532549) can be obtained adding 420532523 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420532523 - 2²⁰ = 419483947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420532492 and 420532501.

It is not a weakly prime, because it can be changed into another prime (420532513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210266261 + 210266262.

It is an arithmetic number, because the mean of its divisors is an integer number (210266262).

Almost surely, 2^420532523 is an apocalyptic number.

420532523 is a deficient number, since it is larger than the sum of its proper divisors (1).

420532523 is an equidigital number, since it uses as much as digits as its factorization.

420532523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 26.

The square root of 420532523 is about 20506.8896471405. The cubic root of 420532523 is about 749.2036127298.

Adding to 420532523 its reverse (325235024), we get a palindrome (745767547).

The spelling of 420532523 in words is "four hundred twenty million, five hundred thirty-two thousand, five hundred twenty-three".