12861506 has 8 divisors (see below), whose sum is σ = 22048320. Its totient is φ = 5512068.

The previous prime is 12861493. The next prime is 12861517. The reversal of 12861506 is 60516821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459326 + ... + 459353.

It is an arithmetic number, because the mean of its divisors is an integer number (2756040).

Almost surely, 2^12861506 is an apocalyptic number.

12861506 is a deficient number, since it is larger than the sum of its proper divisors (9186814).

12861506 is an equidigital number, since it uses as much as digits as its factorization.

12861506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918688.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 12861506 is about 3586.2941875981. The cubic root of 12861506 is about 234.2954968508.

The spelling of 12861506 in words is "twelve million, eight hundred sixty-one thousand, five hundred six".