12553021 has 16 divisors (see below), whose sum is σ = 14515200. Its totient is φ = 10752768.

The previous prime is 12553019. The next prime is 12553039. The reversal of 12553021 is 12035521.

It is not a de Polignac number, because 12553021 - 2¹ = 12553019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12553021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17100 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^12553021 is an apocalyptic number.

It is an amenable number.

12553021 is a deficient number, since it is larger than the sum of its proper divisors (1962179).

12553021 is a wasteful number, since it uses less digits than its factorization.

12553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 12553021 is about 3543.0242731316. The cubic root of 12553021 is about 232.4071143975.

Adding to 12553021 its reverse (12035521), we get a palindrome (24588542).

The spelling of 12553021 in words is "twelve million, five hundred fifty-three thousand, twenty-one".