306842 has 4 divisors (see below), whose sum is σ = 460266. Its totient is φ = 153420.

The previous prime is 306829. The next prime is 306847. The reversal of 306842 is 248603.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 248603 = 37 ⋅6719.

It can be written as a sum of positive squares in only one way, i.e., 292681 + 14161 = 541^2 + 119^2 .

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306842.

It is not an unprimeable number, because it can be changed into a prime (306847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76709 + ... + 76712.

2³⁰⁶⁸⁴² is an apocalyptic number.

306842 is a deficient number, since it is larger than the sum of its proper divisors (153424).

306842 is a wasteful number, since it uses less digits than its factorization.

306842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153423.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 306842 is about 553.9332089702. The cubic root of 306842 is about 67.4483921943.

The spelling of 306842 in words is "three hundred six thousand, eight hundred forty-two".