555345421 has 4 divisors (see below), whose sum is σ = 555703200. Its totient is φ = 554987644.

The previous prime is 555345407. The next prime is 555345463. The reversal of 555345421 is 124543555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 555345421 - 2²⁹ = 18474509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555345491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176551 + ... + 179668.

It is an arithmetic number, because the mean of its divisors is an integer number (138925800).

Almost surely, 2^555345421 is an apocalyptic number.

It is an amenable number.

555345421 is a deficient number, since it is larger than the sum of its proper divisors (357779).

555345421 is a wasteful number, since it uses less digits than its factorization.

555345421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357778.

The product of its digits is 60000, while the sum is 34.

The square root of 555345421 is about 23565.7679908803. The cubic root of 555345421 is about 821.9670310972.

Adding to 555345421 its reverse (124543555), we get a palindrome (679888976).

The spelling of 555345421 in words is "five hundred fifty-five million, three hundred forty-five thousand, four hundred twenty-one".