40101 has 4 divisors (see below), whose sum is σ = 53472.
Its totient is φ = 26732.
The previous prime is 40099. The next prime is 40111. The reversal of 40101 is 10104.
40101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 40101 - 21 = 40099 is a prime.
It is a D-number.
40101 is a modest number, since divided by 101 gives 4 as remainder.
40101 is a lucky number.
It is a self number, because there is not a number n which added to its sum of digits gives 40101.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (40111) 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, 6681 + ... + 6686.
It is an arithmetic number, because the mean of its divisors is an integer number (13368).
240101 is an apocalyptic number.
It is an amenable number.
40101 is a deficient number, since it is larger than the sum of its proper divisors (13371).
40101 is a wasteful number, since it uses less digits than its factorization.
40101 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 13370.
The product of its (nonzero) digits is 4, while the sum is 6.
The square root of 40101 is about 200.2523408103.
The cubic root of 40101 is about 34.2282793355.
Adding to 40101 its reverse (10104), we get a palindrome (50205).
It can be divided in two parts, 40 and 101, that added together give a palindrome (141).
The spelling of 40101 in words is "forty thousand, one hundred one", and thus it is an iban number.