421287235 has 4 divisors (see below), whose sum is σ = 505544688. Its totient is φ = 337029784.

The previous prime is 421287221. The next prime is 421287239. The reversal of 421287235 is 532782124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 421287235 - 2⁵ = 421287203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421287235.

It is not an unprimeable number, because it can be changed into a prime (421287239) 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 3 ways as a sum of consecutive naturals, for example, 42128719 + ... + 42128728.

It is an arithmetic number, because the mean of its divisors is an integer number (126386172).

Almost surely, 2^421287235 is an apocalyptic number.

421287235 is a deficient number, since it is larger than the sum of its proper divisors (84257453).

421287235 is an equidigital number, since it uses as much as digits as its factorization.

421287235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84257452.

The product of its digits is 26880, while the sum is 34.

The square root of 421287235 is about 20525.2828238736. The cubic root of 421287235 is about 749.6515329342.

The spelling of 421287235 in words is "four hundred twenty-one million, two hundred eighty-seven thousand, two hundred thirty-five".