12657161 has 4 divisors (see below), whose sum is σ = 13807824. Its totient is φ = 11506500.

The previous prime is 12657131. The next prime is 12657167. The reversal of 12657161 is 16175621.

12657161 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12657161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12657167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575315 + ... + 575336.

It is an arithmetic number, because the mean of its divisors is an integer number (3451956).

Almost surely, 2^12657161 is an apocalyptic number.

12657161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12657161 is a deficient number, since it is larger than the sum of its proper divisors (1150663).

12657161 is a wasteful number, since it uses less digits than its factorization.

12657161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150662.

The product of its digits is 2520, while the sum is 29.

The square root of 12657161 is about 3557.6904024943. The cubic root of 12657161 is about 233.0480292965.

The spelling of 12657161 in words is "twelve million, six hundred fifty-seven thousand, one hundred sixty-one".