12621056 has 36 divisors (see below), whose sum is σ = 28795872. Its totient is φ = 5408256.

The previous prime is 12621053. The next prime is 12621067. The reversal of 12621056 is 65012621.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621053) 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, 1730 + ... + 5313.

Almost surely, 2^12621056 is an apocalyptic number.

12621056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12621056 is an abundant number, since it is smaller than the sum of its proper divisors (16174816).

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

12621056 is an frugal number, since it uses more digits than its factorization.

12621056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7066 (or 7052 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 12621056 is about 3552.6125597931. The cubic root of 12621056 is about 232.8262256761.

Adding to 12621056 its reverse (65012621), we get a palindrome (77633677).

It can be divided in two parts, 126 and 21056, that multiplied together give a triangular number (2653056 = T₂₃₀₃).

The spelling of 12621056 in words is "twelve million, six hundred twenty-one thousand, fifty-six".