12924661 has 4 divisors (see below), whose sum is σ = 12932524. Its totient is φ = 12916800.

The previous prime is 12924649. The next prime is 12924673. The reversal of 12924661 is 16642921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16642921 = 997 ⋅16693.

It is an interprime number because it is at equal distance from previous prime (12924649) and next prime (12924673).

It can be written as a sum of positive squares in 2 ways, for example, as 6002500 + 6922161 = 2450^2 + 2631^2 .

It is a cyclic number.

It is not a de Polignac number, because 12924661 - 2⁵ = 12924629 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 (12924761) 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, 420 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (3233131).

Almost surely, 2^12924661 is an apocalyptic number.

It is an amenable number.

12924661 is a deficient number, since it is larger than the sum of its proper divisors (7863).

12924661 is an equidigital number, since it uses as much as digits as its factorization.

12924661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862.

The product of its digits is 5184, while the sum is 31.

The square root of 12924661 is about 3595.0884551009. The cubic root of 12924661 is about 234.6783648808.

The spelling of 12924661 in words is "twelve million, nine hundred twenty-four thousand, six hundred sixty-one".