12145552 has 40 divisors (see below), whose sum is σ = 24855552. Its totient is φ = 5740800.

The previous prime is 12145537. The next prime is 12145561. The reversal of 12145552 is 25554121.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23052 + ... + 23572.

Almost surely, 2^12145552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12145552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12427776).

12145552 is an abundant number, since it is smaller than the sum of its proper divisors (12710000).

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

12145552 is a wasteful number, since it uses less digits than its factorization.

12145552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 601 counting only the distinct ones).

The product of its digits is 2000, while the sum is 25.

The square root of 12145552 is about 3485.0469150357. The cubic root of 12145552 is about 229.8647724309.

Adding to 12145552 its reverse (25554121), we get a palindrome (37699673).

The spelling of 12145552 in words is "twelve million, one hundred forty-five thousand, five hundred fifty-two".