421481 has 4 divisors (see below), whose sum is σ = 446292. Its totient is φ = 396672.

The previous prime is 421471. The next prime is 421483. The reversal of 421481 is 184124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 379456 + 42025 = 616^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 421481 - 2⁶ = 421417 is a prime.

It is a super-2 number, since 2×421481² = 355292466722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12380 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (111573).

2⁴²¹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

421481 is a deficient number, since it is larger than the sum of its proper divisors (24811).

421481 is a wasteful number, since it uses less digits than its factorization.

421481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24810.

The product of its digits is 256, while the sum is 20.

The square root of 421481 is about 649.2156806486. The cubic root of 421481 is about 74.9766445796.

The spelling of 421481 in words is "four hundred twenty-one thousand, four hundred eighty-one".