421135827 has 16 divisors (see below), whose sum is σ = 653840640. Its totient is φ = 236107872.

The previous prime is 421135801. The next prime is 421135831. The reversal of 421135827 is 728531124.

It is not a de Polignac number, because 421135827 - 2⁶ = 421135763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421135027) by changing a digit.

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, 188077 + ... + 190302.

It is an arithmetic number, because the mean of its divisors is an integer number (40865040).

Almost surely, 2^421135827 is an apocalyptic number.

421135827 is a deficient number, since it is larger than the sum of its proper divisors (232704813).

421135827 is a wasteful number, since it uses less digits than its factorization.

421135827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378442.

The product of its digits is 13440, while the sum is 33.

The square root of 421135827 is about 20521.5941632223. The cubic root of 421135827 is about 749.5617154810.

The spelling of 421135827 in words is "four hundred twenty-one million, one hundred thirty-five thousand, eight hundred twenty-seven".