421343555 has 16 divisors (see below), whose sum is σ = 558633024. Its totient is φ = 303452160.

The previous prime is 421343543. The next prime is 421343561. The reversal of 421343555 is 555343124.

It is a happy number.

It is not a de Polignac number, because 421343555 - 2⁴ = 421343539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 105806 + ... + 109715.

It is an arithmetic number, because the mean of its divisors is an integer number (34914564).

Almost surely, 2^421343555 is an apocalyptic number.

421343555 is a deficient number, since it is larger than the sum of its proper divisors (137289469).

421343555 is a wasteful number, since it uses less digits than its factorization.

421343555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215566.

The product of its digits is 36000, while the sum is 32.

The square root of 421343555 is about 20526.6547445023. The cubic root of 421343555 is about 749.6849372955.

Adding to 421343555 its reverse (555343124), we get a palindrome (976686679).

The spelling of 421343555 in words is "four hundred twenty-one million, three hundred forty-three thousand, five hundred fifty-five".