306742 has 4 divisors (see below), whose sum is σ = 460116. Its totient is φ = 153370.

The previous prime is 306739. The next prime is 306749. The reversal of 306742 is 247603.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76684 + ... + 76687.

It is an arithmetic number, because the mean of its divisors is an integer number (115029).

2³⁰⁶⁷⁴² is an apocalyptic number.

306742 is a deficient number, since it is larger than the sum of its proper divisors (153374).

306742 is a wasteful number, since it uses less digits than its factorization.

306742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153373.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 306742 is about 553.8429380249. The cubic root of 306742 is about 67.4410642404.

The spelling of 306742 in words is "three hundred six thousand, seven hundred forty-two".