308421 has 8 divisors (see below), whose sum is σ = 456960. Its totient is φ = 205596.

The previous prime is 308411. The next prime is 308423. The reversal of 308421 is 124803.

It is a happy number.

It is not a de Polignac number, because 308421 - 2⁷ = 308293 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 308394 and 308403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308423) 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, 5685 + ... + 5738.

It is an arithmetic number, because the mean of its divisors is an integer number (57120).

2³⁰⁸⁴²¹ is an apocalyptic number.

It is an amenable number.

308421 is a deficient number, since it is larger than the sum of its proper divisors (148539).

308421 is a wasteful number, since it uses less digits than its factorization.

308421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11432 (or 11426 counting only the distinct ones).

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

The square root of 308421 is about 555.3566421679. The cubic root of 308421 is about 67.5638901249.

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

The spelling of 308421 in words is "three hundred eight thousand, four hundred twenty-one".