12859540 has 12 divisors (see below), whose sum is σ = 27005076. Its totient is φ = 5143808.

The previous prime is 12859487. The next prime is 12859543. The reversal of 12859540 is 4595821.

It can be written as a sum of positive squares in 2 ways, for example, as 4588164 + 8271376 = 2142^2 + 2876^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12859496 and 12859505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12859543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321469 + ... + 321508.

It is an arithmetic number, because the mean of its divisors is an integer number (2250423).

Almost surely, 2^12859540 is an apocalyptic number.

12859540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12859540 is an abundant number, since it is smaller than the sum of its proper divisors (14145536).

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

12859540 is a wasteful number, since it uses less digits than its factorization.

12859540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642986 (or 642984 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 12859540 is about 3586.0200780252. The cubic root of 12859540 is about 234.2835581655.

The spelling of 12859540 in words is "twelve million, eight hundred fifty-nine thousand, five hundred forty".