247306 has 4 divisors (see below), whose sum is σ = 370962. Its totient is φ = 123652.

The previous prime is 247301. The next prime is 247309. The reversal of 247306 is 603742.

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

It can be written as a sum of positive squares in only one way, i.e., 189225 + 58081 = 435^2 + 241^2 .

It is a super-2 number, since 2×247306² = 122320515272, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (247301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61825 + ... + 61828.

2²⁴⁷³⁰⁶ is an apocalyptic number.

247306 is a deficient number, since it is larger than the sum of its proper divisors (123656).

247306 is a wasteful number, since it uses less digits than its factorization.

247306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123655.

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

The square root of 247306 is about 497.2987029945. The cubic root of 247306 is about 62.7689529687.

The spelling of 247306 in words is "two hundred forty-seven thousand, three hundred six".