421455 has 8 divisors (see below), whose sum is σ = 674352. Its totient is φ = 224768.

The previous prime is 421453. The next prime is 421459. The reversal of 421455 is 554124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421455 - 2¹ = 421453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14034 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (84294).

2⁴²¹⁴⁵⁵ is an apocalyptic number.

421455 is a deficient number, since it is larger than the sum of its proper divisors (252897).

421455 is a wasteful number, since it uses less digits than its factorization.

421455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28105.

The product of its digits is 800, while the sum is 21.

The square root of 421455 is about 649.1956561777. The cubic root of 421455 is about 74.9751028471.

Adding to 421455 its reverse (554124), we get a palindrome (975579).

The spelling of 421455 in words is "four hundred twenty-one thousand, four hundred fifty-five".