308142 has 48 divisors (see below), whose sum is σ = 758160. Its totient is φ = 89856.

The previous prime is 308141. The next prime is 308149. The reversal of 308142 is 241803.

It is a happy number.

308142 is nontrivially palindromic in base 7.

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

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 308142.

It is not an unprimeable number, because it can be changed into a prime (308141) 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 23 ways as a sum of consecutive naturals, for example, 5788 + ... + 5840.

It is an arithmetic number, because the mean of its divisors is an integer number (15795).

2³⁰⁸¹⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379080).

308142 is an abundant number, since it is smaller than the sum of its proper divisors (450018).

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

308142 is a wasteful number, since it uses less digits than its factorization.

308142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 94 counting only the distinct ones).

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

The square root of 308142 is about 555.1053953980. The cubic root of 308142 is about 67.5435110411.

Adding to 308142 its reverse (241803), we get a palindrome (549945).

The spelling of 308142 in words is "three hundred eight thousand, one hundred forty-two".