841340521 has 16 divisors (see below), whose sum is σ = 989422720. Its totient is φ = 700306560.

The previous prime is 841340519. The next prime is 841340543. The reversal of 841340521 is 125043148.

841340521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 3-Lehmer number, since φ(841340521) divides (841340521-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 841340521 - 2¹ = 841340519 is a prime.

It is a deceptive number, since it divides R_841340520.

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 841340521.

It is not an unprimeable number, because it can be changed into a prime (841340551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145045 + ... + 150733.

It is an arithmetic number, because the mean of its divisors is an integer number (61838920).

It is a Poulet number, since it divides 2^841340520-1.

Almost surely, 2^841340521 is an apocalyptic number.

It is an amenable number.

841340521 is a deficient number, since it is larger than the sum of its proper divisors (148082199).

841340521 is a wasteful number, since it uses less digits than its factorization.

841340521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6304.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 841340521 is about 29005.8704575470. The cubic root of 841340521 is about 944.0404473866.

Adding to 841340521 its reverse (125043148), we get a palindrome (966383669).

The spelling of 841340521 in words is "eight hundred forty-one million, three hundred forty thousand, five hundred twenty-one".