140306 has 12 divisors (see below), whose sum is σ = 220446. Its totient is φ = 66960.
The previous prime is 140297. The next prime is 140317. The reversal of 140306 is 603041.
It can be written as a sum of positive squares in only one way, i.e., 116281 + 24025 = 341^2 + 155^2 .
It is an Ulam number.
It is a Curzon number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140306.
It is an unprimeable number.
140306 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 (5) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1886 + ... + 1958.
2140306 is an apocalyptic number.
140306 is a deficient number, since it is larger than the sum of its proper divisors (80140).
140306 is an equidigital number, since it uses as much as digits as its factorization.
140306 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 137 (or 106 counting only the distinct ones).
The product of its (nonzero) digits is 72, while the sum is 14.
The square root of 140306 is about 374.5744251814. The cubic root of 140306 is about 51.9627445178.
Adding to 140306 its reverse (603041), we get a palindrome (743347).
The spelling of 140306 in words is "one hundred forty thousand, three hundred six".
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