12309057 has 16 divisors (see below), whose sum is σ = 18495360. Its totient is φ = 8089200.

The previous prime is 12309053. The next prime is 12309083. The reversal of 12309057 is 75090321.

12309057 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12309057 - 2² = 12309053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 12309057.

It is not an unprimeable number, because it can be changed into a prime (12309053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294 + ... + 5127.

It is an arithmetic number, because the mean of its divisors is an integer number (1155960).

Almost surely, 2^12309057 is an apocalyptic number.

It is an amenable number.

12309057 is a deficient number, since it is larger than the sum of its proper divisors (6186303).

12309057 is an equidigital number, since it uses as much as digits as its factorization.

12309057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501 (or 6495 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 12309057 is about 3508.4265704159. The cubic root of 12309057 is about 230.8916678743.

Adding to 12309057 its reverse (75090321), we get a palindrome (87399378).

The spelling of 12309057 in words is "twelve million, three hundred nine thousand, fifty-seven".