12127457 has 4 divisors (see below), whose sum is σ = 12385536. Its totient is φ = 11869380.

The previous prime is 12127447. The next prime is 12127459. The reversal of 12127457 is 75472121.

12127457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75472121 = 1171 ⋅64451.

It is not a de Polignac number, because 12127457 - 2⁶ = 12127393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12127459) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 128969 + ... + 129062.

It is an arithmetic number, because the mean of its divisors is an integer number (3096384).

Almost surely, 2^12127457 is an apocalyptic number.

It is an amenable number.

12127457 is a deficient number, since it is larger than the sum of its proper divisors (258079).

12127457 is an equidigital number, since it uses as much as digits as its factorization.

12127457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258078.

The product of its digits is 3920, while the sum is 29.

The square root of 12127457 is about 3482.4498560640. The cubic root of 12127457 is about 229.7505613356.

Adding to 12127457 its reverse (75472121), we get a palindrome (87599578).

The spelling of 12127457 in words is "twelve million, one hundred twenty-seven thousand, four hundred fifty-seven".