12552021 has 6 divisors (see below), whose sum is σ = 18130710. Its totient is φ = 8368008.

The previous prime is 12552011. The next prime is 12552037. The reversal of 12552021 is 12025521.

12552021 is a `hidden beast` number, since 125 + 520 + 21 = 666.

12552021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 4223025 = 2886^2 + 2055^2 .

It is not a de Polignac number, because 12552021 - 2⁷ = 12551893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12551985 and 12552003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 697326 + ... + 697343.

It is an arithmetic number, because the mean of its divisors is an integer number (3021785).

Almost surely, 2^12552021 is an apocalyptic number.

It is an amenable number.

12552021 is a deficient number, since it is larger than the sum of its proper divisors (5578689).

12552021 is a wasteful number, since it uses less digits than its factorization.

12552021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394675 (or 1394672 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12552021 is about 3542.8831479460. The cubic root of 12552021 is about 232.4009428875.

Adding to 12552021 its reverse (12025521), we get a palindrome (24577542).

The spelling of 12552021 in words is "twelve million, five hundred fifty-two thousand, twenty-one".