12561030 has 48 divisors (see below), whose sum is σ = 32853600. Its totient is φ = 3329664.

The previous prime is 12561023. The next prime is 12561061. The reversal of 12561030 is 3016521.

12561030 is a `hidden beast` number, since 1 + 25 + 610 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 12560994 and 12561012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20671 + ... + 21269.

It is an arithmetic number, because the mean of its divisors is an integer number (684450).

Almost surely, 2^12561030 is an apocalyptic number.

12561030 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 12561030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16426800).

12561030 is an abundant number, since it is smaller than the sum of its proper divisors (20292570).

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

12561030 is a wasteful number, since it uses less digits than its factorization.

12561030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 12561030 is about 3544.1543420116. The cubic root of 12561030 is about 232.4565302012.

Adding to 12561030 its reverse (3016521), we get a palindrome (15577551).

The spelling of 12561030 in words is "twelve million, five hundred sixty-one thousand, thirty".