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243442 = 2121721
BaseRepresentation
bin111011011011110010
3110100221101
4323123302
530242232
65115014
72032513
oct733362
9410841
10243442
111569a1
12b8a6a
1386a64
1464a0a
154c1e7
hex3b6f2

243442 has 4 divisors (see below), whose sum is σ = 365166. Its totient is φ = 121720.

The previous prime is 243437. The next prime is 243461. The reversal of 243442 is 244342.

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., 210681 + 32761 = 459^2 + 181^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60859 + ... + 60862.

2243442 is an apocalyptic number.

243442 is a deficient number, since it is larger than the sum of its proper divisors (121724).

243442 is a wasteful number, since it uses less digits than its factorization.

243442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121723.

The product of its digits is 768, while the sum is 19.

The square root of 243442 is about 493.3984191300. The cubic root of 243442 is about 62.4403270443.

Adding to 243442 its reverse (244342), we get a palindrome (487784).

Subtracting 243442 from its reverse (244342), we obtain a square (900 = 302).

The spelling of 243442 in words is "two hundred forty-three thousand, four hundred forty-two", and thus it is an iban number.

Divisors: 1 2 121721 243442