12309761 has 4 divisors (see below), whose sum is σ = 12844992. Its totient is φ = 11774532.

The previous prime is 12309749. The next prime is 12309763. The reversal of 12309761 is 16790321.

12309761 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: 16790321 = 397 ⋅42293.

It is a cyclic number.

It is not a de Polignac number, because 12309761 - 2¹⁸ = 12047617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12309763) 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, 267581 + ... + 267626.

It is an arithmetic number, because the mean of its divisors is an integer number (3211248).

Almost surely, 2^12309761 is an apocalyptic number.

It is an amenable number.

12309761 is a deficient number, since it is larger than the sum of its proper divisors (535231).

12309761 is an equidigital number, since it uses as much as digits as its factorization.

12309761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535230.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 12309761 is about 3508.5268988566. The cubic root of 12309761 is about 230.8960696368.

The spelling of 12309761 in words is "twelve million, three hundred nine thousand, seven hundred sixty-one".