12840258 has 16 divisors (see below), whose sum is σ = 26375040. Its totient is φ = 4164336.

The previous prime is 12840241. The next prime is 12840281. The reversal of 12840258 is 85204821.

12840258 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28698 + ... + 29141.

It is an arithmetic number, because the mean of its divisors is an integer number (1648440).

Almost surely, 2^12840258 is an apocalyptic number.

12840258 is an abundant number, since it is smaller than the sum of its proper divisors (13534782).

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

12840258 is a wasteful number, since it uses less digits than its factorization.

12840258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57881.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 12840258 is about 3583.3305736423. The cubic root of 12840258 is about 234.1664022039.

The spelling of 12840258 in words is "twelve million, eight hundred forty thousand, two hundred fifty-eight".