308121 has 8 divisors (see below), whose sum is σ = 448224. Its totient is φ = 186720.

The previous prime is 308117. The next prime is 308129. The reversal of 308121 is 121803.

It is a happy number.

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

It is not a de Polignac number, because 308121 - 2² = 308117 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 308121.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308121.

It is not an unprimeable number, because it can be changed into a prime (308129) 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, 4636 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (56028).

2³⁰⁸¹²¹ is an apocalyptic number.

It is an amenable number.

308121 is a deficient number, since it is larger than the sum of its proper divisors (140103).

308121 is a wasteful number, since it uses less digits than its factorization.

308121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9351.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 308121 is about 555.0864797489. The cubic root of 308121 is about 67.5419766338.

Adding to 308121 its reverse (121803), we get a palindrome (429924).

The spelling of 308121 in words is "three hundred eight thousand, one hundred twenty-one".