421242355 has 8 divisors (see below), whose sum is σ = 527468832. Its totient is φ = 322341888.

The previous prime is 421242329. The next prime is 421242377. The reversal of 421242355 is 553242124.

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-421242355 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1831374 + ... + 1831603.

It is an arithmetic number, because the mean of its divisors is an integer number (65933604).

Almost surely, 2^421242355 is an apocalyptic number.

421242355 is a deficient number, since it is larger than the sum of its proper divisors (106226477).

421242355 is a wasteful number, since it uses less digits than its factorization.

421242355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663005.

The product of its digits is 9600, while the sum is 28.

The square root of 421242355 is about 20524.1895089672. The cubic root of 421242355 is about 749.6249117022.

Adding to 421242355 its reverse (553242124), we get a palindrome (974484479).

The spelling of 421242355 in words is "four hundred twenty-one million, two hundred forty-two thousand, three hundred fifty-five".