12861290 has 64 divisors (see below), whose sum is σ = 27095040. Its totient is φ = 4354560.

The previous prime is 12861287. The next prime is 12861313. The reversal of 12861290 is 9216821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101207 + ... + 101333.

It is an arithmetic number, because the mean of its divisors is an integer number (423360).

Almost surely, 2^12861290 is an apocalyptic number.

12861290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12861290 is an abundant number, since it is smaller than the sum of its proper divisors (14233750).

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

12861290 is a wasteful number, since it uses less digits than its factorization.

12861290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 12861290 is about 3586.2640728201. The cubic root of 12861290 is about 234.2941852338.

The spelling of 12861290 in words is "twelve million, eight hundred sixty-one thousand, two hundred ninety".