421205355 has 24 divisors (see below), whose sum is σ = 730566720. Its totient is φ = 224496000.

The previous prime is 421205347. The next prime is 421205431. The reversal of 421205355 is 553502124.

It is a happy number.

421205355 is a `hidden beast` number, since 4 + 2 + 120 + 535 + 5 = 666.

It is not a de Polignac number, because 421205355 - 2³ = 421205347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133486 + ... + 136604.

It is an arithmetic number, because the mean of its divisors is an integer number (30440280).

Almost surely, 2^421205355 is an apocalyptic number.

421205355 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421205355 is a deficient number, since it is larger than the sum of its proper divisors (309361365).

421205355 is a wasteful number, since it uses less digits than its factorization.

421205355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131 (or 6128 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 421205355 is about 20523.2881137502. The cubic root of 421205355 is about 749.6029631861.

Adding to 421205355 its reverse (553502124), we get a palindrome (974707479).

The spelling of 421205355 in words is "four hundred twenty-one million, two hundred five thousand, three hundred fifty-five".