421401333 has 24 divisors (see below), whose sum is σ = 583869792. Its totient is φ = 270200448.

The previous prime is 421401329. The next prime is 421401341. The reversal of 421401333 is 333104124.

It is not a de Polignac number, because 421401333 - 2² = 421401329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421401373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 687135 + ... + 687747.

It is an arithmetic number, because the mean of its divisors is an integer number (24327908).

Almost surely, 2^421401333 is an apocalyptic number.

421401333 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

421401333 is a deficient number, since it is larger than the sum of its proper divisors (162468459).

421401333 is an equidigital number, since it uses as much as digits as its factorization.

421401333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 421401333 is about 20528.0620858375. The cubic root of 421401333 is about 749.7192033285.

Adding to 421401333 its reverse (333104124), we get a palindrome (754505457).

The spelling of 421401333 in words is "four hundred twenty-one million, four hundred one thousand, three hundred thirty-three".