12690861 has 8 divisors (see below), whose sum is σ = 16964160. Its totient is φ = 8439072.

The previous prime is 12690859. The next prime is 12690883. The reversal of 12690861 is 16809621.

12690861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12690861 - 2¹ = 12690859 is a prime.

It is a super-2 number, since 2×12690861² = 322115905842642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12690851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3945 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (2120520).

Almost surely, 2^12690861 is an apocalyptic number.

It is an amenable number.

12690861 is a deficient number, since it is larger than the sum of its proper divisors (4273299).

12690861 is a wasteful number, since it uses less digits than its factorization.

12690861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10755.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 12690861 is about 3562.4234728623. The cubic root of 12690861 is about 233.2546780239.

The spelling of 12690861 in words is "twelve million, six hundred ninety thousand, eight hundred sixty-one".