421735 has 4 divisors (see below), whose sum is σ = 506088. Its totient is φ = 337384.

The previous prime is 421727. The next prime is 421739. The reversal of 421735 is 537124.

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 421735 - 2³ = 421727 is a prime.

It is a Duffinian number.

421735 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421739) 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, 42169 + ... + 42178.

It is an arithmetic number, because the mean of its divisors is an integer number (126522).

2⁴²¹⁷³⁵ is an apocalyptic number.

421735 is a deficient number, since it is larger than the sum of its proper divisors (84353).

421735 is an equidigital number, since it uses as much as digits as its factorization.

421735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84352.

The product of its digits is 840, while the sum is 22.

The square root of 421735 is about 649.4112718455. The cubic root of 421735 is about 74.9917027858.

Adding to 421735 its reverse (537124), we get a palindrome (958859).

It can be divided in two parts, 421 and 735, that added together give a square (1156 = 34²).

The spelling of 421735 in words is "four hundred twenty-one thousand, seven hundred thirty-five".