12405552 has 20 divisors (see below), whose sum is σ = 32047800. Its totient is φ = 4135168.

The previous prime is 12405541. The next prime is 12405557. The reversal of 12405552 is 25550421.

It is a happy number.

12405552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (12405557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129177 + ... + 129272.

It is an arithmetic number, because the mean of its divisors is an integer number (1602390).

Almost surely, 2^12405552 is an apocalyptic number.

12405552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12405552 is an abundant number, since it is smaller than the sum of its proper divisors (19642248).

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

12405552 is a wasteful number, since it uses less digits than its factorization.

12405552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258460 (or 258454 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 12405552 is about 3522.1516151353. The cubic root of 12405552 is about 231.4934449176.

Adding to 12405552 its reverse (25550421), we get a palindrome (37955973).

The spelling of 12405552 in words is "twelve million, four hundred five thousand, five hundred fifty-two".