12055857 has 32 divisors (see below), whose sum is σ = 18320256. Its totient is φ = 6988800.

The previous prime is 12055847. The next prime is 12055859. The reversal of 12055857 is 75855021.

12055857 = 269² + 270² + ... + 381².

It is a happy number.

It is not a de Polignac number, because 12055857 - 2²³ = 3667249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (12055859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106633 + ... + 106745.

It is an arithmetic number, because the mean of its divisors is an integer number (572508).

Almost surely, 2^12055857 is an apocalyptic number.

It is an amenable number.

12055857 is a deficient number, since it is larger than the sum of its proper divisors (6264399).

12055857 is a wasteful number, since it uses less digits than its factorization.

12055857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

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

The square root of 12055857 is about 3472.1545184510. The cubic root of 12055857 is about 229.2975226801.

The spelling of 12055857 in words is "twelve million, fifty-five thousand, eight hundred fifty-seven".