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12140 = 225607
BaseRepresentation
bin10111101101100
3121122122
42331230
5342030
6132112
750252
oct27554
917578
1012140
119137
127038
1356ab
1445d2
1538e5
hex2f6c

12140 has 12 divisors (see below), whose sum is σ = 25536. Its totient is φ = 4848.

The previous prime is 12119. The next prime is 12143. The reversal of 12140 is 4121.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (12143) 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, 284 + ... + 323.

It is an arithmetic number, because the mean of its divisors is an integer number (2128).

212140 is an apocalyptic number.

12140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12140 is an abundant number, since it is smaller than the sum of its proper divisors (13396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12768).

12140 is a wasteful number, since it uses less digits than its factorization.

12140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 12140 is about 110.1816681667. The cubic root of 12140 is about 22.9829741672.

Adding to 12140 its reverse (4121), we get a palindrome (16261).

It can be divided in two parts, 121 and 40, that added together give a palindrome (161).

The spelling of 12140 in words is "twelve thousand, one hundred forty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 607 1214 2428 3035 6070 12140