421308 has 48 divisors (see below), whose sum is σ = 1128960. Its totient is φ = 135792.

The previous prime is 421303. The next prime is 421313. The reversal of 421308 is 803124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421303) and next prime (421313).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421303) by changing a digit.

421308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5035 + ... + 5117.

It is an arithmetic number, because the mean of its divisors is an integer number (23520).

2⁴²¹³⁰⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (564480).

421308 is an abundant number, since it is smaller than the sum of its proper divisors (707652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421308 is a wasteful number, since it uses less digits than its factorization.

421308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 421308 is about 649.0824292800. The cubic root of 421308 is about 74.9663849360.

It can be divided in two parts, 421 and 308, that added together give a 6-th power (729 = 3⁶).

The spelling of 421308 in words is "four hundred twenty-one thousand, three hundred eight".