Cookie Consent by
Search a number
15841 = 73173

15841 has 8 divisors (see below), whose sum is σ = 18944. Its totient is φ = 12960.

The previous prime is 15823. The next prime is 15859. The reversal of 15841 is 14851.

15841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15823) and next prime (15859).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 2-Lehmer number, since φ(15841) divides (15841-1)2.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 15841 - 25 = 15809 is a prime.

It is a deceptive number, since it divides R15840.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 253.

It is an arithmetic number, because the mean of its divisors is an integer number (2368).

It is a Poulet number, since it divides 215840-1.

215841 is an apocalyptic number.

15841 is the 73-rd octagonal number.

It is an amenable number.

15841 is a deficient number, since it is larger than the sum of its proper divisors (3103).

15841 is an equidigital number, since it uses as much as digits as its factorization.

15841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its digits is 160, while the sum is 19.

The square root of 15841 is about 125.8610344785. The cubic root of 15841 is about 25.1146731981.

Subtracting from 15841 its reverse (14851), we obtain a triangular number (990 = T44).

The spelling of 15841 in words is "fifteen thousand, eight hundred forty-one".

Divisors: 1 7 31 73 217 511 2263 15841