421355 has 16 divisors (see below), whose sum is σ = 566784. Its totient is φ = 298080.

The previous prime is 421349. The next prime is 421361. The reversal of 421355 is 553124.

It is an interprime number because it is at equal distance from previous prime (421349) and next prime (421361).

It is not a de Polignac number, because 421355 - 2⁴ = 421339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2504 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (35424).

2⁴²¹³⁵⁵ is an apocalyptic number.

421355 is a deficient number, since it is larger than the sum of its proper divisors (145429).

421355 is a wasteful number, since it uses less digits than its factorization.

421355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226.

The product of its digits is 600, while the sum is 20.

The square root of 421355 is about 649.1186332251. The cubic root of 421355 is about 74.9691725158.

Adding to 421355 its reverse (553124), we get a palindrome (974479).

Subtracting 421355 from its reverse (553124), we obtain a square (131769 = 363²).

The spelling of 421355 in words is "four hundred twenty-one thousand, three hundred fifty-five".