12558220 has 12 divisors (see below), whose sum is σ = 26372304. Its totient is φ = 5023280.

The previous prime is 12558211. The next prime is 12558229. The reversal of 12558220 is 2285521.

It is an interprime number because it is at equal distance from previous prime (12558211) and next prime (12558229).

It is not an unprimeable number, because it can be changed into a prime (12558229) 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, 313936 + ... + 313975.

It is an arithmetic number, because the mean of its divisors is an integer number (2197692).

Almost surely, 2^12558220 is an apocalyptic number.

12558220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12558220 is an abundant number, since it is smaller than the sum of its proper divisors (13814084).

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

12558220 is a wasteful number, since it uses less digits than its factorization.

12558220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627920 (or 627918 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 12558220 is about 3543.7578924074. The cubic root of 12558220 is about 232.4391947979.

The spelling of 12558220 in words is "twelve million, five hundred fifty-eight thousand, two hundred twenty".