12561552 has 60 divisors (see below), whose sum is σ = 35612304. Its totient is φ = 4132800.

The previous prime is 12561551. The next prime is 12561599. The reversal of 12561552 is 25516521.

It is not an unprimeable number, because it can be changed into a prime (12561551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11427 + ... + 12477.

Almost surely, 2^12561552 is an apocalyptic number.

12561552 is a gapful number since it is divisible by the number (12) 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 12561552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17806152).

12561552 is an abundant number, since it is smaller than the sum of its proper divisors (23050752).

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

12561552 is a wasteful number, since it uses less digits than its factorization.

12561552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148 (or 1139 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 12561552 is about 3544.2279836376. The cubic root of 12561552 is about 232.4597502298.

The spelling of 12561552 in words is "twelve million, five hundred sixty-one thousand, five hundred fifty-two".