12739161 has 4 divisors (see below), whose sum is σ = 16985552. Its totient is φ = 8492772.

The previous prime is 12739159. The next prime is 12739163. The reversal of 12739161 is 16193721.

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: 16193721 = 3 ⋅5397907.

It is an interprime number because it is at equal distance from previous prime (12739159) and next prime (12739163).

It is not a de Polignac number, because 12739161 - 2¹ = 12739159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12739163) 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, 2123191 + ... + 2123196.

It is an arithmetic number, because the mean of its divisors is an integer number (4246388).

Almost surely, 2^12739161 is an apocalyptic number.

It is an amenable number.

12739161 is a deficient number, since it is larger than the sum of its proper divisors (4246391).

12739161 is an equidigital number, since it uses as much as digits as its factorization.

12739161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246390.

The product of its digits is 2268, while the sum is 30.

The square root of 12739161 is about 3569.1961279818. The cubic root of 12739161 is about 233.5502171644.

The spelling of 12739161 in words is "twelve million, seven hundred thirty-nine thousand, one hundred sixty-one".