421030523 has 2 divisors, whose sum is σ = 421030524. Its totient is φ = 421030522.

The previous prime is 421030453. The next prime is 421030543. The reversal of 421030523 is 325030124.

It is a happy number.

It is an a-pointer prime, because the next prime (421030543) can be obtained adding 421030523 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421030523 - 2¹⁶ = 420964987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421030495 and 421030504.

It is not a weakly prime, because it can be changed into another prime (421030543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210515261 + 210515262.

It is an arithmetic number, because the mean of its divisors is an integer number (210515262).

Almost surely, 2^421030523 is an apocalyptic number.

421030523 is a deficient number, since it is larger than the sum of its proper divisors (1).

421030523 is an equidigital number, since it uses as much as digits as its factorization.

421030523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 421030523 is about 20519.0283152005. The cubic root of 421030523 is about 749.4992349054.

Adding to 421030523 its reverse (325030124), we get a palindrome (746060647).

The spelling of 421030523 in words is "four hundred twenty-one million, thirty thousand, five hundred twenty-three".