421300544545 has 4 divisors (see below), whose sum is σ = 505560653460. Its totient is φ = 337040435632.

The previous prime is 421300544527. The next prime is 421300544579. The reversal of 421300544545 is 545445003124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 256523003361 + 164777541184 = 506481^2 + 405928^2 .

It is a cyclic number.

It is not a de Polignac number, because 421300544545 - 2⁵ = 421300544513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42130054450 + ... + 42130054459.

It is an arithmetic number, because the mean of its divisors is an integer number (126390163365).

Almost surely, 2^421300544545 is an apocalyptic number.

It is an amenable number.

421300544545 is a deficient number, since it is larger than the sum of its proper divisors (84260108915).

421300544545 is an equidigital number, since it uses as much as digits as its factorization.

421300544545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84260108914.

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 421300544545 its reverse (545445003124), we get a palindrome (966745547669).

The spelling of 421300544545 in words is "four hundred twenty-one billion, three hundred million, five hundred forty-four thousand, five hundred forty-five".