41039821 has 4 divisors (see below), whose sum is σ = 41057500. Its totient is φ = 41022144.

The previous prime is 41039813. The next prime is 41039839. The reversal of 41039821 is 12893014.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12893014 = 2 ⋅6446507.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 21058921 = 4470^2 + 4589^2 .

It is a cyclic number.

It is not a de Polignac number, because 41039821 - 2³ = 41039813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 41039821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41039851) 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, 4716 + ... + 10213.

It is an arithmetic number, because the mean of its divisors is an integer number (10264375).

Almost surely, 2^41039821 is an apocalyptic number.

It is an amenable number.

41039821 is a deficient number, since it is larger than the sum of its proper divisors (17679).

41039821 is a wasteful number, since it uses less digits than its factorization.

41039821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17678.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 41039821 is about 6406.2329804652. The cubic root of 41039821 is about 344.9333232484.

It can be divided in two parts, 4103 and 9821, that added together give a square (13924 = 118²).

The spelling of 41039821 in words is "forty-one million, thirty-nine thousand, eight hundred twenty-one".