12399552 has 168 divisors, whose sum is σ = 41208960. Its totient is φ = 3525120.

The previous prime is 12399547. The next prime is 12399577. The reversal of 12399552 is 25599321.

It is a happy number.

12399552 is a `hidden beast` number, since 12 + 3 + 99 + 552 = 666.

12399552 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 (36).

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, 120333 + ... + 120435.

Almost surely, 2^12399552 is an apocalyptic number.

12399552 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 12399552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20604480).

12399552 is an abundant number, since it is smaller than the sum of its proper divisors (28809408).

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

12399552 is a wasteful number, since it uses less digits than its factorization.

12399552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 138 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 12399552 is about 3521.2997600318. The cubic root of 12399552 is about 231.4561179569.

The spelling of 12399552 in words is "twelve million, three hundred ninety-nine thousand, five hundred fifty-two".