12716491 has 4 divisors (see below), whose sum is σ = 13385800. Its totient is φ = 12047184.

The previous prime is 12716489. The next prime is 12716497. The reversal of 12716491 is 19461721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19461721 = 1237 ⋅15733.

It is a cyclic number.

It is not a de Polignac number, because 12716491 - 2¹ = 12716489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12716497) 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, 334626 + ... + 334663.

It is an arithmetic number, because the mean of its divisors is an integer number (3346450).

Almost surely, 2^12716491 is an apocalyptic number.

12716491 is a deficient number, since it is larger than the sum of its proper divisors (669309).

12716491 is an equidigital number, since it uses as much as digits as its factorization.

12716491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669308.

The product of its digits is 3024, while the sum is 31.

The square root of 12716491 is about 3566.0189287215. The cubic root of 12716491 is about 233.4115966489.

The spelling of 12716491 in words is "twelve million, seven hundred sixteen thousand, four hundred ninety-one".