12557020 has 48 divisors (see below), whose sum is σ = 30340800. Its totient is φ = 4276224.

The previous prime is 12556997. The next prime is 12557021. The reversal of 12557020 is 2075521.

It is a junction number, because it is equal to n+sod(n) for n = 12556982 and 12557000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35806 + ... + 36154.

It is an arithmetic number, because the mean of its divisors is an integer number (632100).

Almost surely, 2^12557020 is an apocalyptic number.

12557020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12557020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15170400).

12557020 is an abundant number, since it is smaller than the sum of its proper divisors (17783780).

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

12557020 is a wasteful number, since it uses less digits than its factorization.

12557020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 12557020 is about 3543.5885765704. The cubic root of 12557020 is about 232.4317909907.

The spelling of 12557020 in words is "twelve million, five hundred fifty-seven thousand, twenty".