421320266545 has 8 divisors (see below), whose sum is σ = 506690634024. Its totient is φ = 336318670464.

The previous prime is 421320266539. The next prime is 421320266561. The reversal of 421320266545 is 545662023124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 243992529936 + 177327736609 = 493956^2 + 421103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421320266545 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421320266498 and 421320266507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92190334 + ... + 92194903.

It is an arithmetic number, because the mean of its divisors is an integer number (63336329253).

Almost surely, 2^421320266545 is an apocalyptic number.

It is an amenable number.

421320266545 is a deficient number, since it is larger than the sum of its proper divisors (85370367479).

421320266545 is a wasteful number, since it uses less digits than its factorization.

421320266545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184385699.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 421320266545 its reverse (545662023124), we get a palindrome (966982289669).

The spelling of 421320266545 in words is "four hundred twenty-one billion, three hundred twenty million, two hundred sixty-six thousand, five hundred forty-five".