12862181 has 4 divisors (see below), whose sum is σ = 12870432. Its totient is φ = 12853932.

The previous prime is 12862169. The next prime is 12862193. The reversal of 12862181 is 18126821.

12862181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18126821 = 61 ⋅297161.

It is an interprime number because it is at equal distance from previous prime (12862169) and next prime (12862193).

It is a cyclic number.

It is not a de Polignac number, because 12862181 - 2¹⁴ = 12845797 is a prime.

It is a super-2 number, since 2×12862181² = 330871400153522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12862111) 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, 995 + ... + 5168.

It is an arithmetic number, because the mean of its divisors is an integer number (3217608).

Almost surely, 2^12862181 is an apocalyptic number.

It is an amenable number.

12862181 is a deficient number, since it is larger than the sum of its proper divisors (8251).

12862181 is an equidigital number, since it uses as much as digits as its factorization.

12862181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8250.

The product of its digits is 1536, while the sum is 29.

The square root of 12862181 is about 3586.3882946496. The cubic root of 12862181 is about 234.2995955594.

The spelling of 12862181 in words is "twelve million, eight hundred sixty-two thousand, one hundred eighty-one".