12905740 has 24 divisors (see below), whose sum is σ = 27320832. Its totient is φ = 5120640.

The previous prime is 12905723. The next prime is 12905749. The reversal of 12905740 is 4750921.

It is a happy number.

12905740 is a nontrivial binomial coefficient, being equal to C(5081, 2).

It is a junction number, because it is equal to n+sod(n) for n = 12905699 and 12905708.

It is not an unprimeable number, because it can be changed into a prime (12905749) 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 7 ways as a sum of consecutive naturals, for example, 1 + ... + 5080.

It is an arithmetic number, because the mean of its divisors is an integer number (1138368).

Almost surely, 2^12905740 is an apocalyptic number.

12905740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12905740 is the 5080-th triangular number.

12905740 is the 1694-th centered nonagonal number.

It is an amenable number.

12905740 is an abundant number, since it is smaller than the sum of its proper divisors (14415092).

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

12905740 is a wasteful number, since it uses less digits than its factorization.

12905740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12905740 is about 3592.4559844207. The cubic root of 12905740 is about 234.5637901693.

The spelling of 12905740 in words is "twelve million, nine hundred five thousand, seven hundred forty".