12816461 has 4 divisors (see below), whose sum is σ = 14647392. Its totient is φ = 10985532.

The previous prime is 12816457. The next prime is 12816473. The reversal of 12816461 is 16461821.

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: 16461821 = 29 ⋅567649.

It is a cyclic number.

It is not a de Polignac number, because 12816461 - 2² = 12816457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816421) 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, 915455 + ... + 915468.

It is an arithmetic number, because the mean of its divisors is an integer number (3661848).

Almost surely, 2^12816461 is an apocalyptic number.

It is an amenable number.

12816461 is a deficient number, since it is larger than the sum of its proper divisors (1830931).

12816461 is an equidigital number, since it uses as much as digits as its factorization.

12816461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830930.

The product of its digits is 2304, while the sum is 29.

The square root of 12816461 is about 3580.0085195429. The cubic root of 12816461 is about 234.0216516357.

The spelling of 12816461 in words is "twelve million, eight hundred sixteen thousand, four hundred sixty-one".