12904056 has 64 divisors (see below), whose sum is σ = 39110400. Its totient is φ = 3909600.

The previous prime is 12904049. The next prime is 12904061. The reversal of 12904056 is 65040921.

12904056 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12904056² = 333029322502272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340 + ... + 5091.

It is an arithmetic number, because the mean of its divisors is an integer number (611100).

Almost surely, 2^12904056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12904056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19555200).

12904056 is an abundant number, since it is smaller than the sum of its proper divisors (26206344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12904056 is a wasteful number, since it uses less digits than its factorization.

12904056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5457 (or 5447 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 12904056 is about 3592.2215967281. The cubic root of 12904056 is about 234.5535874067.

Adding to 12904056 its reverse (65040921), we get a palindrome (77944977).

The spelling of 12904056 in words is "twelve million, nine hundred four thousand, fifty-six".