12781355 has 8 divisors (see below), whose sum is σ = 15388512. Its totient is φ = 10191168.

The previous prime is 12781343. The next prime is 12781361. The reversal of 12781355 is 55318721.

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 12781355 - 2⁴ = 12781339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2519 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (1923564).

Almost surely, 2^12781355 is an apocalyptic number.

12781355 is a deficient number, since it is larger than the sum of its proper divisors (2607157).

12781355 is an equidigital number, since it uses as much as digits as its factorization.

12781355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8485.

The product of its digits is 8400, while the sum is 32.

The square root of 12781355 is about 3575.1020964442. The cubic root of 12781355 is about 233.8077840500.

The spelling of 12781355 in words is "twelve million, seven hundred eighty-one thousand, three hundred fifty-five".