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12330981 = 331319432
BaseRepresentation
bin101111000010…
…011111100101
3212012110221000
4233002133211
511124042411
61120143513
7206545245
oct57023745
925173830
1012330981
116a624a3
124167b99
132729850
1418cdb25
151138956
hexbc27e5

12330981 has 48 divisors (see below), whose sum is σ = 21201600. Its totient is φ = 7021728.

The previous prime is 12330979. The next prime is 12330991. The reversal of 12330981 is 18903321.

12330981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12330981 - 21 = 12330979 is a prime.

It is a super-2 number, since 2×123309812 = 304106184844722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12330991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286746 + ... + 286788.

It is an arithmetic number, because the mean of its divisors is an integer number (441700).

Almost surely, 212330981 is an apocalyptic number.

It is an amenable number.

12330981 is a deficient number, since it is larger than the sum of its proper divisors (8870619).

12330981 is a wasteful number, since it uses less digits than its factorization.

12330981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 12330981 is about 3511.5496579146. The cubic root of 12330981 is about 231.0286690679.

The spelling of 12330981 in words is "twelve million, three hundred thirty thousand, nine hundred eighty-one".

Divisors: 1 3 9 13 19 27 39 43 57 117 129 171 247 351 387 513 559 741 817 1161 1677 1849 2223 2451 5031 5547 6669 7353 10621 15093 16641 22059 24037 31863 35131 49923 72111 95589 105393 216333 286767 316179 456703 648999 948537 1370109 4110327 12330981