305142 has 8 divisors (see below), whose sum is σ = 610296. Its totient is φ = 101712.

The previous prime is 305131. The next prime is 305143. The reversal of 305142 is 241503.

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

305142 is an admirable number.

It is a super-2 number, since 2×305142² = 186223280328, which contains 22 as substring.

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 305142.

It is not an unprimeable number, because it can be changed into a prime (305143) by changing a digit.

305142 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 3 ways as a sum of consecutive naturals, for example, 25423 + ... + 25434.

It is an arithmetic number, because the mean of its divisors is an integer number (76287).

2³⁰⁵¹⁴² is an apocalyptic number.

305142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

305142 is a wasteful number, since it uses less digits than its factorization.

305142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50862.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 305142 is about 552.3965966586. The cubic root of 305142 is about 67.3235997650.

Adding to 305142 its reverse (241503), we get a palindrome (546645).

The spelling of 305142 in words is "three hundred five thousand, one hundred forty-two".