12561570 has 96 divisors (see below), whose sum is σ = 37859328. Its totient is φ = 2830464.

The previous prime is 12561551. The next prime is 12561599. The reversal of 12561570 is 7516521.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79932 + ... + 80088.

It is an arithmetic number, because the mean of its divisors is an integer number (394368).

Almost surely, 2^12561570 is an apocalyptic number.

12561570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12561570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18929664).

12561570 is an abundant number, since it is smaller than the sum of its proper divisors (25297758).

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

12561570 is a wasteful number, since it uses less digits than its factorization.

12561570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 12561570 is about 3544.2305229767. The cubic root of 12561570 is about 232.4598612637.

It can be divided in two parts, 12561 and 570, that added together give a palindrome (13131).

The spelling of 12561570 in words is "twelve million, five hundred sixty-one thousand, five hundred seventy".