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12945 = 35863
BaseRepresentation
bin11001010010001
3122202110
43022101
5403240
6135533
752512
oct31221
918673
1012945
1197a9
1275a9
135b7a
144a09
153c80
hex3291

12945 has 8 divisors (see below), whose sum is σ = 20736. Its totient is φ = 6896.

The previous prime is 12941. The next prime is 12953. The reversal of 12945 is 54921.

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

It is a cyclic number.

It is not a de Polignac number, because 12945 - 22 = 12941 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (12941) 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, 417 + ... + 446.

It is an arithmetic number, because the mean of its divisors is an integer number (2592).

212945 is an apocalyptic number.

12945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12945 is a deficient number, since it is larger than the sum of its proper divisors (7791).

12945 is an equidigital number, since it uses as much as digits as its factorization.

12945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its digits is 360, while the sum is 21.

The square root of 12945 is about 113.7760959077. The cubic root of 12945 is about 23.4801401549.

The spelling of 12945 in words is "twelve thousand, nine hundred forty-five".

Divisors: 1 3 5 15 863 2589 4315 12945