421408235 has 4 divisors (see below), whose sum is σ = 505689888. Its totient is φ = 337126584.

The previous prime is 421408219. The next prime is 421408237. The reversal of 421408235 is 532804124.

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 421408235 - 2⁴ = 421408219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421408198 and 421408207.

It is not an unprimeable number, because it can be changed into a prime (421408237) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42140819 + ... + 42140828.

It is an arithmetic number, because the mean of its divisors is an integer number (126422472).

Almost surely, 2^421408235 is an apocalyptic number.

421408235 is a deficient number, since it is larger than the sum of its proper divisors (84281653).

421408235 is an equidigital number, since it uses as much as digits as its factorization.

421408235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84281652.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 421408235 is about 20528.2301964880. The cubic root of 421408235 is about 749.7232964446.

The spelling of 421408235 in words is "four hundred twenty-one million, four hundred eight thousand, two hundred thirty-five".