12558020 has 12 divisors (see below), whose sum is σ = 26371884. Its totient is φ = 5023200.

The previous prime is 12558017. The next prime is 12558041. The reversal of 12558020 is 2085521.

It can be written as a sum of positive squares in 2 ways, for example, as 2534464 + 10023556 = 1592^2 + 3166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313931 + ... + 313970.

It is an arithmetic number, because the mean of its divisors is an integer number (2197657).

Almost surely, 2^12558020 is an apocalyptic number.

12558020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12558020 is an abundant number, since it is smaller than the sum of its proper divisors (13813864).

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

12558020 is a wasteful number, since it uses less digits than its factorization.

12558020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627910 (or 627908 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 12558020 is about 3543.7296736630. The cubic root of 12558020 is about 232.4379608628.

The spelling of 12558020 in words is "twelve million, five hundred fifty-eight thousand, twenty".