306142 has 4 divisors (see below), whose sum is σ = 459216. Its totient is φ = 153070.

The previous prime is 306139. The next prime is 306149. The reversal of 306142 is 241603.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76534 + ... + 76537.

It is an arithmetic number, because the mean of its divisors is an integer number (114804).

2³⁰⁶¹⁴² is an apocalyptic number.

306142 is a deficient number, since it is larger than the sum of its proper divisors (153074).

306142 is a wasteful number, since it uses less digits than its factorization.

306142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153073.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 306142 is about 553.3010030716. The cubic root of 306142 is about 67.3970630377.

Adding to 306142 its reverse (241603), we get a palindrome (547745).

The spelling of 306142 in words is "three hundred six thousand, one hundred forty-two".