140811 has 16 divisors (see below), whose sum is σ = 217728. Its totient is φ = 80000.
The previous prime is 140797. The next prime is 140813. The reversal of 140811 is 118041.
It is a 7-Lehmer number, since φ(140811) divides (140811-1)7.
It is a cyclic number.
It is not a de Polignac number, because 140811 - 25 = 140779 is a prime.
It is not an unprimeable number, because it can be changed into a prime (140813) by changing a digit.
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 in 15 ways as a sum of consecutive naturals, for example, 436 + ... + 686.
It is an arithmetic number, because the mean of its divisors is an integer number (13608).
2140811 is an apocalyptic number.
140811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
140811 is a deficient number, since it is larger than the sum of its proper divisors (76917).
140811 is a wasteful number, since it uses less digits than its factorization.
140811 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 282.
The product of its (nonzero) digits is 32, while the sum is 15.
The square root of 140811 is about 375.2479180489. The cubic root of 140811 is about 52.0250126215.
Adding to 140811 its reverse (118041), we get a palindrome (258852).
The spelling of 140811 in words is "one hundred forty thousand, eight hundred eleven".
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