40501 has 4 divisors (see below), whose sum is σ = 41004. Its totient is φ = 40000.
The previous prime is 40499. The next prime is 40507. The reversal of 40501 is 10504.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 39601 + 900 = 199^2 + 30^2 .
It is a 3-Lehmer number, since φ(40501) divides (40501-1)3.
It is a cyclic number.
It is not a de Polignac number, because 40501 - 21 = 40499 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (40507) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100 + ... + 301.
It is an arithmetic number, because the mean of its divisors is an integer number (10251).
240501 is an apocalyptic number.
40501 is the 101-st decagonal number.
It is an amenable number.
40501 is a deficient number, since it is larger than the sum of its proper divisors (503).
40501 is a wasteful number, since it uses less digits than its factorization.
40501 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 502.
The product of its (nonzero) digits is 20, while the sum is 10.
The square root of 40501 is about 201.2486024796. The cubic root of 40501 is about 34.3417099198.
The spelling of 40501 in words is "forty thousand, five hundred one".
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