243706 has 4 divisors (see below), whose sum is σ = 365562. Its totient is φ = 121852.

The previous prime is 243703. The next prime is 243707. The reversal of 243706 is 607342.

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., 148225 + 95481 = 385^2 + 309^2 .

It is a super-2 number, since 2×243706² = 118785228872, 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 (243701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60925 + ... + 60928.

2²⁴³⁷⁰⁶ is an apocalyptic number.

243706 is a deficient number, since it is larger than the sum of its proper divisors (121856).

243706 is a wasteful number, since it uses less digits than its factorization.

243706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121855.

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

The square root of 243706 is about 493.6658789100. The cubic root of 243706 is about 62.4628899699.

It can be divided in two parts, 243 and 706, that added together give a palindrome (949).

The spelling of 243706 in words is "two hundred forty-three thousand, seven hundred six".