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144706 = 272353
BaseRepresentation
bin100011010101000010
321100111111
4203111002
514112311
63033534
71141612
oct432502
9240444
10144706
11997a1
126b8aa
1350b33
143aa42
152cd21
hex23542

144706 has 4 divisors (see below), whose sum is σ = 217062. Its totient is φ = 72352.

The previous prime is 144701. The next prime is 144709. The reversal of 144706 is 607441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 607441 = 1274783.

It can be written as a sum of positive squares in only one way, i.e., 84681 + 60025 = 291^2 + 245^2 .

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 (144701) by changing a digit.

144706 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36175 + ... + 36178.

2144706 is an apocalyptic number.

144706 is a deficient number, since it is larger than the sum of its proper divisors (72356).

144706 is an equidigital number, since it uses as much as digits as its factorization.

144706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72355.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 144706 is about 380.4024184991. The cubic root of 144706 is about 52.5003476923.

The spelling of 144706 in words is "one hundred forty-four thousand, seven hundred six".

Divisors: 1 2 72353 144706