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BaseRepresentation
bin100010101010011101
321012202120
4202222131
514020411
63013153
71130640
oct425235
9235676
10141981
1197744
126a1b9
134c818
1439a57
152c106
hex22a9d

141981 has 8 divisors (see below), whose sum is σ = 216384. Its totient is φ = 81120.

The previous prime is 141971. The next prime is 141991. The reversal of 141981 is 189141.

141981 is digitally balanced in base 2, 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 (141971) and next prime (141991).

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

It is not a de Polignac number, because 141981 - 26 = 141917 is a prime.

It is a super-2 number, since 2×1419812 = 40317208722, which contains 22 as substring.

141981 is a lucky number.

It is a nialpdrome in base 11.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 141981.

It is not an unprimeable number, because it can be changed into a prime (141931) 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, 3360 + ... + 3401.

It is an arithmetic number, because the mean of its divisors is an integer number (27048).

2141981 is an apocalyptic number.

It is an amenable number.

141981 is a deficient number, since it is larger than the sum of its proper divisors (74403).

141981 is an equidigital number, since it uses as much as digits as its factorization.

141981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771.

The product of its digits is 288, while the sum is 24.

The square root of 141981 is about 376.8036624026. The cubic root of 141981 is about 52.1687074818.

The spelling of 141981 in words is "one hundred forty-one thousand, nine hundred eighty-one".

Divisors: 1 3 7 21 6761 20283 47327 141981