13552921 has 4 divisors (see below), whose sum is σ = 13990144. Its totient is φ = 13115700.

The previous prime is 13552901. The next prime is 13552933. The reversal of 13552921 is 12925531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13552921 - 2⁷ = 13552793 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 13552921.

It is not an unprimeable number, because it can be changed into a prime (13552901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218565 + ... + 218626.

It is an arithmetic number, because the mean of its divisors is an integer number (3497536).

Almost surely, 2^13552921 is an apocalyptic number.

It is an amenable number.

13552921 is a deficient number, since it is larger than the sum of its proper divisors (437223).

13552921 is an equidigital number, since it uses as much as digits as its factorization.

13552921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437222.

The product of its digits is 2700, while the sum is 28.

The square root of 13552921 is about 3681.4292061644. The cubic root of 13552921 is about 238.4208886044.

The spelling of 13552921 in words is "thirteen million, five hundred fifty-two thousand, nine hundred twenty-one".