12904081 has 4 divisors (see below), whose sum is σ = 13465152. Its totient is φ = 12343012.

The previous prime is 12904079. The next prime is 12904103. The reversal of 12904081 is 18040921.

It is a happy number.

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: 18040921 = 631 ⋅28591.

It is a cyclic number.

It is not a de Polignac number, because 12904081 - 2¹ = 12904079 is a prime.

It is a super-2 number, since 2×12904081² = 333030612909122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12904061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280501 + ... + 280546.

It is an arithmetic number, because the mean of its divisors is an integer number (3366288).

Almost surely, 2^12904081 is an apocalyptic number.

It is an amenable number.

12904081 is a deficient number, since it is larger than the sum of its proper divisors (561071).

12904081 is an equidigital number, since it uses as much as digits as its factorization.

12904081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561070.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12904081 is about 3592.2250764672. The cubic root of 12904081 is about 234.5537388793.

The spelling of 12904081 in words is "twelve million, nine hundred four thousand, eighty-one".