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30141 = 3217197
BaseRepresentation
bin111010110111101
31112100100
413112331
51431031
6351313
7153606
oct72675
945310
1030141
1120711
1215539
1310947
14adad
158de6
hex75bd

30141 has 12 divisors (see below), whose sum is σ = 46332. Its totient is φ = 18816.

The previous prime is 30139. The next prime is 30161. The reversal of 30141 is 14103.

It can be written as a sum of positive squares in 2 ways, for example, as 27225 + 2916 = 165^2 + 54^2 .

It is not a de Polignac number, because 30141 - 21 = 30139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an alternating number because its digits alternate between odd and even.

30141 is an undulating number in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55 + ... + 251.

It is an arithmetic number, because the mean of its divisors is an integer number (3861).

230141 is an apocalyptic number.

It is an amenable number.

30141 is a deficient number, since it is larger than the sum of its proper divisors (16191).

30141 is a wasteful number, since it uses less digits than its factorization.

30141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30141 is about 173.6116355548. The cubic root of 30141 is about 31.1209289687.

Adding to 30141 its reverse (14103), we get a palindrome (44244).

It can be divided in two parts, 30 and 141, that added together give a palindrome (171).

The spelling of 30141 in words is "thirty thousand, one hundred forty-one".

Divisors: 1 3 9 17 51 153 197 591 1773 3349 10047 30141