12620556 has 96 divisors (see below), whose sum is σ = 35985600. Its totient is φ = 3801600.

The previous prime is 12620549. The next prime is 12620561. The reversal of 12620556 is 65502621.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124906 + ... + 125006.

It is an arithmetic number, because the mean of its divisors is an integer number (374850).

Almost surely, 2^12620556 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 12620556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17992800).

12620556 is an abundant number, since it is smaller than the sum of its proper divisors (23365044).

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

12620556 is a wasteful number, since it uses less digits than its factorization.

12620556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 12620556 is about 3552.5421883491. The cubic root of 12620556 is about 232.8231510614.

The spelling of 12620556 in words is "twelve million, six hundred twenty thousand, five hundred fifty-six".