421130555 has 4 divisors (see below), whose sum is σ = 505356672. Its totient is φ = 336904440.

The previous prime is 421130543. The next prime is 421130569. The reversal of 421130555 is 555031124.

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

It is not a de Polignac number, because 421130555 - 2¹⁰ = 421129531 is a prime.

It is a Duffinian number.

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, 42113051 + ... + 42113060.

It is an arithmetic number, because the mean of its divisors is an integer number (126339168).

Almost surely, 2^421130555 is an apocalyptic number.

421130555 is a deficient number, since it is larger than the sum of its proper divisors (84226117).

421130555 is an equidigital number, since it uses as much as digits as its factorization.

421130555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84226116.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 421130555 is about 20521.4657127604. The cubic root of 421130555 is about 749.5585876652.

Adding to 421130555 its reverse (555031124), we get a palindrome (976161679).

The spelling of 421130555 in words is "four hundred twenty-one million, one hundred thirty thousand, five hundred fifty-five".