12769121 has 4 divisors (see below), whose sum is σ = 13441200. Its totient is φ = 12097044.

The previous prime is 12769109. The next prime is 12769129. The reversal of 12769121 is 12196721.

12769121 is digitally balanced in base 2, 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: 12196721 = 41 ⋅297481.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12769121 is a prime.

It is a super-2 number, since 2×12769121² = 326100902225282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12769129) 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, 336011 + ... + 336048.

It is an arithmetic number, because the mean of its divisors is an integer number (3360300).

Almost surely, 2^12769121 is an apocalyptic number.

It is an amenable number.

12769121 is a deficient number, since it is larger than the sum of its proper divisors (672079).

12769121 is an equidigital number, since it uses as much as digits as its factorization.

12769121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672078.

The product of its digits is 1512, while the sum is 29.

The square root of 12769121 is about 3573.3906867288. The cubic root of 12769121 is about 233.7331618744.

It can be divided in two parts, 12769 and 121, that multiplied together give a square (1545049 = 1243²).

The spelling of 12769121 in words is "twelve million, seven hundred sixty-nine thousand, one hundred twenty-one".