12891885 has 8 divisors (see below), whose sum is σ = 20627040. Its totient is φ = 6875664.

The previous prime is 12891881. The next prime is 12891929. The reversal of 12891885 is 58819821.

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

It is not a de Polignac number, because 12891885 - 2² = 12891881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12891881) 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, 429715 + ... + 429744.

It is an arithmetic number, because the mean of its divisors is an integer number (2578380).

Almost surely, 2^12891885 is an apocalyptic number.

12891885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12891885 is a deficient number, since it is larger than the sum of its proper divisors (7735155).

12891885 is an equidigital number, since it uses as much as digits as its factorization.

12891885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859467.

The product of its digits is 46080, while the sum is 42.

The square root of 12891885 is about 3590.5271200758. The cubic root of 12891885 is about 234.4798212020.

The spelling of 12891885 in words is "twelve million, eight hundred ninety-one thousand, eight hundred eighty-five".