12805381 has 8 divisors (see below), whose sum is σ = 12988800. Its totient is φ = 12623520.

The previous prime is 12805349. The next prime is 12805417. The reversal of 12805381 is 18350821.

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

It is a cyclic number.

It is not a de Polignac number, because 12805381 - 2⁵ = 12805349 is a prime.

It is a super-2 number, since 2×12805381² = 327955565110322, 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 (12805081) 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, 31105 + ... + 31513.

It is an arithmetic number, because the mean of its divisors is an integer number (1623600).

Almost surely, 2^12805381 is an apocalyptic number.

It is an amenable number.

12805381 is a deficient number, since it is larger than the sum of its proper divisors (183419).

12805381 is a wasteful number, since it uses less digits than its factorization.

12805381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 12805381 is about 3578.4607025927. The cubic root of 12805381 is about 233.9541939219.

The spelling of 12805381 in words is "twelve million, eight hundred five thousand, three hundred eighty-one".