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12961180 = 225648059
BaseRepresentation
bin110001011100…
…010110011100
3220101111101201
4301130112130
511304224210
61141445244
7215111461
oct61342634
926344351
1012961180
117352a21
124410824
1328ba64b
141a15668
15121053a
hexc5c59c

12961180 has 12 divisors (see below), whose sum is σ = 27218520. Its totient is φ = 5184464.

The previous prime is 12961177. The next prime is 12961181. The reversal of 12961180 is 8116921.

It is a happy number.

12961180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961181) 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, 324010 + ... + 324049.

It is an arithmetic number, because the mean of its divisors is an integer number (2268210).

Almost surely, 212961180 is an apocalyptic number.

12961180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12961180 is an abundant number, since it is smaller than the sum of its proper divisors (14257340).

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

12961180 is a wasteful number, since it uses less digits than its factorization.

12961180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648068 (or 648066 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 12961180 is about 3600.1638851586. The cubic root of 12961180 is about 234.8991871794.

The spelling of 12961180 in words is "twelve million, nine hundred sixty-one thousand, one hundred eighty".

Divisors: 1 2 4 5 10 20 648059 1296118 2592236 3240295 6480590 12961180