12857055 has 8 divisors (see below), whose sum is σ = 20571312. Its totient is φ = 6857088.

The previous prime is 12857021. The next prime is 12857057. The reversal of 12857055 is 55075821.

It is a happy number.

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

It is not a de Polignac number, because 12857055 - 2¹³ = 12848863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12857057) 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, 428554 + ... + 428583.

It is an arithmetic number, because the mean of its divisors is an integer number (2571414).

Almost surely, 2^12857055 is an apocalyptic number.

12857055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12857055 is a deficient number, since it is larger than the sum of its proper divisors (7714257).

12857055 is an equidigital number, since it uses as much as digits as its factorization.

12857055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857145.

The product of its (nonzero) digits is 14000, while the sum is 33.

The square root of 12857055 is about 3585.6735768890. The cubic root of 12857055 is about 234.2684660718.

The spelling of 12857055 in words is "twelve million, eight hundred fifty-seven thousand, fifty-five".