12057 has 4 divisors (see below), whose sum is σ = 16080. Its totient is φ = 8036.
The previous prime is 12049. The next prime is 12071. The reversal of 12057 is 75021.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 12057 - 23 = 12049 is a prime.
It is an Ulam number.
It is a D-number.
12057 is a lucky number.
It is a plaindrome in base 15.
It is not an unprimeable number, because it can be changed into a prime (12007) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007 + ... + 2012.
It is an arithmetic number, because the mean of its divisors is an integer number (4020).
212057 is an apocalyptic number.
It is an amenable number.
12057 is a deficient number, since it is larger than the sum of its proper divisors (4023).
12057 is an equidigital number, since it uses as much as digits as its factorization.
12057 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4022.
The product of its (nonzero) digits is 70, while the sum is 15.
The square root of 12057 is about 109.8043714977. The cubic root of 12057 is about 22.9304768917.
Adding to 12057 its reverse (75021), we get a palindrome (87078).
The spelling of 12057 in words is "twelve thousand, fifty-seven".
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